Date:   Mon, 17 Dec 2018 16:48:22 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        torvalds@...ux-foundation.org, stable@...r.kernel.org
Cc:     lwn@....net, Jiri Slaby <jslaby@...e.cz>
Subject: Re: Linux 3.18.130

diff --git a/Documentation/Makefile b/Documentation/Makefile
index fc759598c4c9..59d516b7afcb 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -1,4 +1,3 @@
 subdir-y := accounting auxdisplay blackfin connector \
 	filesystems filesystems ia64 laptops misc-devices \
-	networking pcmcia prctl ptp spi timers vDSO video4linux \
-	watchdog
+	pcmcia prctl ptp spi timers vDSO video4linux watchdog
diff --git a/Documentation/networking/Makefile b/Documentation/networking/Makefile
deleted file mode 100644
index 4c5d7c485439..000000000000
--- a/Documentation/networking/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-subdir-y := timestamping
diff --git a/Documentation/networking/timestamping/.gitignore b/Documentation/networking/timestamping/.gitignore
deleted file mode 100644
index 9e69e982fb38..000000000000
--- a/Documentation/networking/timestamping/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-timestamping
-txtimestamp
-hwtstamp_config
diff --git a/Documentation/networking/timestamping/Makefile b/Documentation/networking/timestamping/Makefile
deleted file mode 100644
index 8c20dfaa4d6e..000000000000
--- a/Documentation/networking/timestamping/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-# To compile, from the source root
-#
-#    make headers_install
-#    make M=documentation
-
-# List of programs to build
-hostprogs-y := hwtstamp_config timestamping txtimestamp
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
-
-HOSTCFLAGS_timestamping.o += -I$(objtree)/usr/include
-HOSTCFLAGS_txtimestamp.o += -I$(objtree)/usr/include
-HOSTCFLAGS_hwtstamp_config.o += -I$(objtree)/usr/include
diff --git a/Documentation/networking/timestamping/hwtstamp_config.c b/Documentation/networking/timestamping/hwtstamp_config.c
deleted file mode 100644
index e8b685a7f15f..000000000000
--- a/Documentation/networking/timestamping/hwtstamp_config.c
+++ /dev/null
@@ -1,134 +0,0 @@
-/* Test program for SIOC{G,S}HWTSTAMP
- * Copyright 2013 Solarflare Communications
- * Author: Ben Hutchings
- */
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <sys/socket.h>
-#include <sys/ioctl.h>
-
-#include <linux/if.h>
-#include <linux/net_tstamp.h>
-#include <linux/sockios.h>
-
-static int
-lookup_value(const char **names, int size, const char *name)
-{
-	int value;
-
-	for (value = 0; value < size; value++)
-		if (names[value] && strcasecmp(names[value], name) == 0)
-			return value;
-
-	return -1;
-}
-
-static const char *
-lookup_name(const char **names, int size, int value)
-{
-	return (value >= 0 && value < size) ? names[value] : NULL;
-}
-
-static void list_names(FILE *f, const char **names, int size)
-{
-	int value;
-
-	for (value = 0; value < size; value++)
-		if (names[value])
-			fprintf(f, "    %s\n", names[value]);
-}
-
-static const char *tx_types[] = {
-#define TX_TYPE(name) [HWTSTAMP_TX_ ## name] = #name
-	TX_TYPE(OFF),
-	TX_TYPE(ON),
-	TX_TYPE(ONESTEP_SYNC)
-#undef TX_TYPE
-};
-#define N_TX_TYPES ((int)(sizeof(tx_types) / sizeof(tx_types[0])))
-
-static const char *rx_filters[] = {
-#define RX_FILTER(name) [HWTSTAMP_FILTER_ ## name] = #name
-	RX_FILTER(NONE),
-	RX_FILTER(ALL),
-	RX_FILTER(SOME),
-	RX_FILTER(PTP_V1_L4_EVENT),
-	RX_FILTER(PTP_V1_L4_SYNC),
-	RX_FILTER(PTP_V1_L4_DELAY_REQ),
-	RX_FILTER(PTP_V2_L4_EVENT),
-	RX_FILTER(PTP_V2_L4_SYNC),
-	RX_FILTER(PTP_V2_L4_DELAY_REQ),
-	RX_FILTER(PTP_V2_L2_EVENT),
-	RX_FILTER(PTP_V2_L2_SYNC),
-	RX_FILTER(PTP_V2_L2_DELAY_REQ),
-	RX_FILTER(PTP_V2_EVENT),
-	RX_FILTER(PTP_V2_SYNC),
-	RX_FILTER(PTP_V2_DELAY_REQ),
-#undef RX_FILTER
-};
-#define N_RX_FILTERS ((int)(sizeof(rx_filters) / sizeof(rx_filters[0])))
-
-static void usage(void)
-{
-	fputs("Usage: hwtstamp_config if_name [tx_type rx_filter]\n"
-	      "tx_type is any of (case-insensitive):\n",
-	      stderr);
-	list_names(stderr, tx_types, N_TX_TYPES);
-	fputs("rx_filter is any of (case-insensitive):\n", stderr);
-	list_names(stderr, rx_filters, N_RX_FILTERS);
-}
-
-int main(int argc, char **argv)
-{
-	struct ifreq ifr;
-	struct hwtstamp_config config;
-	const char *name;
-	int sock;
-
-	if ((argc != 2 && argc != 4) || (strlen(argv[1]) >= IFNAMSIZ)) {
-		usage();
-		return 2;
-	}
-
-	if (argc == 4) {
-		config.flags = 0;
-		config.tx_type = lookup_value(tx_types, N_TX_TYPES, argv[2]);
-		config.rx_filter = lookup_value(rx_filters, N_RX_FILTERS, argv[3]);
-		if (config.tx_type < 0 || config.rx_filter < 0) {
-			usage();
-			return 2;
-		}
-	}
-
-	sock = socket(AF_INET, SOCK_DGRAM, 0);
-	if (sock < 0) {
-		perror("socket");
-		return 1;
-	}
-
-	strcpy(ifr.ifr_name, argv[1]);
-	ifr.ifr_data = (caddr_t)&config;
-
-	if (ioctl(sock, (argc == 2) ? SIOCGHWTSTAMP : SIOCSHWTSTAMP, &ifr)) {
-		perror("ioctl");
-		return 1;
-	}
-
-	printf("flags = %#x\n", config.flags);
-	name = lookup_name(tx_types, N_TX_TYPES, config.tx_type);
-	if (name)
-		printf("tx_type = %s\n", name);
-	else
-		printf("tx_type = %d\n", config.tx_type);
-	name = lookup_name(rx_filters, N_RX_FILTERS, config.rx_filter);
-	if (name)
-		printf("rx_filter = %s\n", name);
-	else
-		printf("rx_filter = %d\n", config.rx_filter);
-
-	return 0;
-}
diff --git a/Documentation/networking/timestamping/timestamping.c b/Documentation/networking/timestamping/timestamping.c
deleted file mode 100644
index 5cdfd743447b..000000000000
--- a/Documentation/networking/timestamping/timestamping.c
+++ /dev/null
@@ -1,528 +0,0 @@
-/*
- * This program demonstrates how the various time stamping features in
- * the Linux kernel work. It emulates the behavior of a PTP
- * implementation in stand-alone master mode by sending PTPv1 Sync
- * multicasts once every second. It looks for similar packets, but
- * beyond that doesn't actually implement PTP.
- *
- * Outgoing packets are time stamped with SO_TIMESTAMPING with or
- * without hardware support.
- *
- * Incoming packets are time stamped with SO_TIMESTAMPING with or
- * without hardware support, SIOCGSTAMP[NS] (per-socket time stamp) and
- * SO_TIMESTAMP[NS].
- *
- * Copyright (C) 2009 Intel Corporation.
- * Author: Patrick Ohly <patrick.ohly@...el.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-
-#include <sys/time.h>
-#include <sys/socket.h>
-#include <sys/select.h>
-#include <sys/ioctl.h>
-#include <arpa/inet.h>
-#include <net/if.h>
-
-#include <asm/types.h>
-#include <linux/net_tstamp.h>
-#include <linux/errqueue.h>
-
-#ifndef SO_TIMESTAMPING
-# define SO_TIMESTAMPING         37
-# define SCM_TIMESTAMPING        SO_TIMESTAMPING
-#endif
-
-#ifndef SO_TIMESTAMPNS
-# define SO_TIMESTAMPNS 35
-#endif
-
-#ifndef SIOCGSTAMPNS
-# define SIOCGSTAMPNS 0x8907
-#endif
-
-#ifndef SIOCSHWTSTAMP
-# define SIOCSHWTSTAMP 0x89b0
-#endif
-
-static void usage(const char *error)
-{
-	if (error)
-		printf("invalid option: %s\n", error);
-	printf("timestamping interface option*\n\n"
-	       "Options:\n"
-	       "  IP_MULTICAST_LOOP - looping outgoing multicasts\n"
-	       "  SO_TIMESTAMP - normal software time stamping, ms resolution\n"
-	       "  SO_TIMESTAMPNS - more accurate software time stamping\n"
-	       "  SOF_TIMESTAMPING_TX_HARDWARE - hardware time stamping of outgoing packets\n"
-	       "  SOF_TIMESTAMPING_TX_SOFTWARE - software fallback for outgoing packets\n"
-	       "  SOF_TIMESTAMPING_RX_HARDWARE - hardware time stamping of incoming packets\n"
-	       "  SOF_TIMESTAMPING_RX_SOFTWARE - software fallback for incoming packets\n"
-	       "  SOF_TIMESTAMPING_SOFTWARE - request reporting of software time stamps\n"
-	       "  SOF_TIMESTAMPING_RAW_HARDWARE - request reporting of raw HW time stamps\n"
-	       "  SIOCGSTAMP - check last socket time stamp\n"
-	       "  SIOCGSTAMPNS - more accurate socket time stamp\n");
-	exit(1);
-}
-
-static void bail(const char *error)
-{
-	printf("%s: %s\n", error, strerror(errno));
-	exit(1);
-}
-
-static const unsigned char sync[] = {
-	0x00, 0x01, 0x00, 0x01,
-	0x5f, 0x44, 0x46, 0x4c,
-	0x54, 0x00, 0x00, 0x00,
-	0x00, 0x00, 0x00, 0x00,
-	0x00, 0x00, 0x00, 0x00,
-	0x01, 0x01,
-
-	/* fake uuid */
-	0x00, 0x01,
-	0x02, 0x03, 0x04, 0x05,
-
-	0x00, 0x01, 0x00, 0x37,
-	0x00, 0x00, 0x00, 0x08,
-	0x00, 0x00, 0x00, 0x00,
-	0x49, 0x05, 0xcd, 0x01,
-	0x29, 0xb1, 0x8d, 0xb0,
-	0x00, 0x00, 0x00, 0x00,
-	0x00, 0x01,
-
-	/* fake uuid */
-	0x00, 0x01,
-	0x02, 0x03, 0x04, 0x05,
-
-	0x00, 0x00, 0x00, 0x37,
-	0x00, 0x00, 0x00, 0x04,
-	0x44, 0x46, 0x4c, 0x54,
-	0x00, 0x00, 0xf0, 0x60,
-	0x00, 0x01, 0x00, 0x00,
-	0x00, 0x00, 0x00, 0x01,
-	0x00, 0x00, 0xf0, 0x60,
-	0x00, 0x00, 0x00, 0x00,
-	0x00, 0x00, 0x00, 0x04,
-	0x44, 0x46, 0x4c, 0x54,
-	0x00, 0x01,
-
-	/* fake uuid */
-	0x00, 0x01,
-	0x02, 0x03, 0x04, 0x05,
-
-	0x00, 0x00, 0x00, 0x00,
-	0x00, 0x00, 0x00, 0x00,
-	0x00, 0x00, 0x00, 0x00,
-	0x00, 0x00, 0x00, 0x00
-};
-
-static void sendpacket(int sock, struct sockaddr *addr, socklen_t addr_len)
-{
-	struct timeval now;
-	int res;
-
-	res = sendto(sock, sync, sizeof(sync), 0,
-		addr, addr_len);
-	gettimeofday(&now, 0);
-	if (res < 0)
-		printf("%s: %s\n", "send", strerror(errno));
-	else
-		printf("%ld.%06ld: sent %d bytes\n",
-		       (long)now.tv_sec, (long)now.tv_usec,
-		       res);
-}
-
-static void printpacket(struct msghdr *msg, int res,
-			char *data,
-			int sock, int recvmsg_flags,
-			int siocgstamp, int siocgstampns)
-{
-	struct sockaddr_in *from_addr = (struct sockaddr_in *)msg->msg_name;
-	struct cmsghdr *cmsg;
-	struct timeval tv;
-	struct timespec ts;
-	struct timeval now;
-
-	gettimeofday(&now, 0);
-
-	printf("%ld.%06ld: received %s data, %d bytes from %s, %zu bytes control messages\n",
-	       (long)now.tv_sec, (long)now.tv_usec,
-	       (recvmsg_flags & MSG_ERRQUEUE) ? "error" : "regular",
-	       res,
-	       inet_ntoa(from_addr->sin_addr),
-	       msg->msg_controllen);
-	for (cmsg = CMSG_FIRSTHDR(msg);
-	     cmsg;
-	     cmsg = CMSG_NXTHDR(msg, cmsg)) {
-		printf("   cmsg len %zu: ", cmsg->cmsg_len);
-		switch (cmsg->cmsg_level) {
-		case SOL_SOCKET:
-			printf("SOL_SOCKET ");
-			switch (cmsg->cmsg_type) {
-			case SO_TIMESTAMP: {
-				struct timeval *stamp =
-					(struct timeval *)CMSG_DATA(cmsg);
-				printf("SO_TIMESTAMP %ld.%06ld",
-				       (long)stamp->tv_sec,
-				       (long)stamp->tv_usec);
-				break;
-			}
-			case SO_TIMESTAMPNS: {
-				struct timespec *stamp =
-					(struct timespec *)CMSG_DATA(cmsg);
-				printf("SO_TIMESTAMPNS %ld.%09ld",
-				       (long)stamp->tv_sec,
-				       (long)stamp->tv_nsec);
-				break;
-			}
-			case SO_TIMESTAMPING: {
-				struct timespec *stamp =
-					(struct timespec *)CMSG_DATA(cmsg);
-				printf("SO_TIMESTAMPING ");
-				printf("SW %ld.%09ld ",
-				       (long)stamp->tv_sec,
-				       (long)stamp->tv_nsec);
-				stamp++;
-				/* skip deprecated HW transformed */
-				stamp++;
-				printf("HW raw %ld.%09ld",
-				       (long)stamp->tv_sec,
-				       (long)stamp->tv_nsec);
-				break;
-			}
-			default:
-				printf("type %d", cmsg->cmsg_type);
-				break;
-			}
-			break;
-		case IPPROTO_IP:
-			printf("IPPROTO_IP ");
-			switch (cmsg->cmsg_type) {
-			case IP_RECVERR: {
-				struct sock_extended_err *err =
-					(struct sock_extended_err *)CMSG_DATA(cmsg);
-				printf("IP_RECVERR ee_errno '%s' ee_origin %d => %s",
-					strerror(err->ee_errno),
-					err->ee_origin,
-#ifdef SO_EE_ORIGIN_TIMESTAMPING
-					err->ee_origin == SO_EE_ORIGIN_TIMESTAMPING ?
-					"bounced packet" : "unexpected origin"
-#else
-					"probably SO_EE_ORIGIN_TIMESTAMPING"
-#endif
-					);
-				if (res < sizeof(sync))
-					printf(" => truncated data?!");
-				else if (!memcmp(sync, data + res - sizeof(sync),
-							sizeof(sync)))
-					printf(" => GOT OUR DATA BACK (HURRAY!)");
-				break;
-			}
-			case IP_PKTINFO: {
-				struct in_pktinfo *pktinfo =
-					(struct in_pktinfo *)CMSG_DATA(cmsg);
-				printf("IP_PKTINFO interface index %u",
-					pktinfo->ipi_ifindex);
-				break;
-			}
-			default:
-				printf("type %d", cmsg->cmsg_type);
-				break;
-			}
-			break;
-		default:
-			printf("level %d type %d",
-				cmsg->cmsg_level,
-				cmsg->cmsg_type);
-			break;
-		}
-		printf("\n");
-	}
-
-	if (siocgstamp) {
-		if (ioctl(sock, SIOCGSTAMP, &tv))
-			printf("   %s: %s\n", "SIOCGSTAMP", strerror(errno));
-		else
-			printf("SIOCGSTAMP %ld.%06ld\n",
-			       (long)tv.tv_sec,
-			       (long)tv.tv_usec);
-	}
-	if (siocgstampns) {
-		if (ioctl(sock, SIOCGSTAMPNS, &ts))
-			printf("   %s: %s\n", "SIOCGSTAMPNS", strerror(errno));
-		else
-			printf("SIOCGSTAMPNS %ld.%09ld\n",
-			       (long)ts.tv_sec,
-			       (long)ts.tv_nsec);
-	}
-}
-
-static void recvpacket(int sock, int recvmsg_flags,
-		       int siocgstamp, int siocgstampns)
-{
-	char data[256];
-	struct msghdr msg;
-	struct iovec entry;
-	struct sockaddr_in from_addr;
-	struct {
-		struct cmsghdr cm;
-		char control[512];
-	} control;
-	int res;
-
-	memset(&msg, 0, sizeof(msg));
-	msg.msg_iov = &entry;
-	msg.msg_iovlen = 1;
-	entry.iov_base = data;
-	entry.iov_len = sizeof(data);
-	msg.msg_name = (caddr_t)&from_addr;
-	msg.msg_namelen = sizeof(from_addr);
-	msg.msg_control = &control;
-	msg.msg_controllen = sizeof(control);
-
-	res = recvmsg(sock, &msg, recvmsg_flags|MSG_DONTWAIT);
-	if (res < 0) {
-		printf("%s %s: %s\n",
-		       "recvmsg",
-		       (recvmsg_flags & MSG_ERRQUEUE) ? "error" : "regular",
-		       strerror(errno));
-	} else {
-		printpacket(&msg, res, data,
-			    sock, recvmsg_flags,
-			    siocgstamp, siocgstampns);
-	}
-}
-
-int main(int argc, char **argv)
-{
-	int so_timestamping_flags = 0;
-	int so_timestamp = 0;
-	int so_timestampns = 0;
-	int siocgstamp = 0;
-	int siocgstampns = 0;
-	int ip_multicast_loop = 0;
-	char *interface;
-	int i;
-	int enabled = 1;
-	int sock;
-	struct ifreq device;
-	struct ifreq hwtstamp;
-	struct hwtstamp_config hwconfig, hwconfig_requested;
-	struct sockaddr_in addr;
-	struct ip_mreq imr;
-	struct in_addr iaddr;
-	int val;
-	socklen_t len;
-	struct timeval next;
-
-	if (argc < 2)
-		usage(0);
-	interface = argv[1];
-
-	for (i = 2; i < argc; i++) {
-		if (!strcasecmp(argv[i], "SO_TIMESTAMP"))
-			so_timestamp = 1;
-		else if (!strcasecmp(argv[i], "SO_TIMESTAMPNS"))
-			so_timestampns = 1;
-		else if (!strcasecmp(argv[i], "SIOCGSTAMP"))
-			siocgstamp = 1;
-		else if (!strcasecmp(argv[i], "SIOCGSTAMPNS"))
-			siocgstampns = 1;
-		else if (!strcasecmp(argv[i], "IP_MULTICAST_LOOP"))
-			ip_multicast_loop = 1;
-		else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_TX_HARDWARE"))
-			so_timestamping_flags |= SOF_TIMESTAMPING_TX_HARDWARE;
-		else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_TX_SOFTWARE"))
-			so_timestamping_flags |= SOF_TIMESTAMPING_TX_SOFTWARE;
-		else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_RX_HARDWARE"))
-			so_timestamping_flags |= SOF_TIMESTAMPING_RX_HARDWARE;
-		else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_RX_SOFTWARE"))
-			so_timestamping_flags |= SOF_TIMESTAMPING_RX_SOFTWARE;
-		else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_SOFTWARE"))
-			so_timestamping_flags |= SOF_TIMESTAMPING_SOFTWARE;
-		else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_RAW_HARDWARE"))
-			so_timestamping_flags |= SOF_TIMESTAMPING_RAW_HARDWARE;
-		else
-			usage(argv[i]);
-	}
-
-	sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
-	if (sock < 0)
-		bail("socket");
-
-	memset(&device, 0, sizeof(device));
-	strncpy(device.ifr_name, interface, sizeof(device.ifr_name));
-	if (ioctl(sock, SIOCGIFADDR, &device) < 0)
-		bail("getting interface IP address");
-
-	memset(&hwtstamp, 0, sizeof(hwtstamp));
-	strncpy(hwtstamp.ifr_name, interface, sizeof(hwtstamp.ifr_name));
-	hwtstamp.ifr_data = (void *)&hwconfig;
-	memset(&hwconfig, 0, sizeof(hwconfig));
-	hwconfig.tx_type =
-		(so_timestamping_flags & SOF_TIMESTAMPING_TX_HARDWARE) ?
-		HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
-	hwconfig.rx_filter =
-		(so_timestamping_flags & SOF_TIMESTAMPING_RX_HARDWARE) ?
-		HWTSTAMP_FILTER_PTP_V1_L4_SYNC : HWTSTAMP_FILTER_NONE;
-	hwconfig_requested = hwconfig;
-	if (ioctl(sock, SIOCSHWTSTAMP, &hwtstamp) < 0) {
-		if ((errno == EINVAL || errno == ENOTSUP) &&
-		    hwconfig_requested.tx_type == HWTSTAMP_TX_OFF &&
-		    hwconfig_requested.rx_filter == HWTSTAMP_FILTER_NONE)
-			printf("SIOCSHWTSTAMP: disabling hardware time stamping not possible\n");
-		else
-			bail("SIOCSHWTSTAMP");
-	}
-	printf("SIOCSHWTSTAMP: tx_type %d requested, got %d; rx_filter %d requested, got %d\n",
-	       hwconfig_requested.tx_type, hwconfig.tx_type,
-	       hwconfig_requested.rx_filter, hwconfig.rx_filter);
-
-	/* bind to PTP port */
-	addr.sin_family = AF_INET;
-	addr.sin_addr.s_addr = htonl(INADDR_ANY);
-	addr.sin_port = htons(319 /* PTP event port */);
-	if (bind(sock,
-		 (struct sockaddr *)&addr,
-		 sizeof(struct sockaddr_in)) < 0)
-		bail("bind");
-
-	/* set multicast group for outgoing packets */
-	inet_aton("224.0.1.130", &iaddr); /* alternate PTP domain 1 */
-	addr.sin_addr = iaddr;
-	imr.imr_multiaddr.s_addr = iaddr.s_addr;
-	imr.imr_interface.s_addr =
-		((struct sockaddr_in *)&device.ifr_addr)->sin_addr.s_addr;
-	if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_IF,
-		       &imr.imr_interface.s_addr, sizeof(struct in_addr)) < 0)
-		bail("set multicast");
-
-	/* join multicast group, loop our own packet */
-	if (setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP,
-		       &imr, sizeof(struct ip_mreq)) < 0)
-		bail("join multicast group");
-
-	if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_LOOP,
-		       &ip_multicast_loop, sizeof(enabled)) < 0) {
-		bail("loop multicast");
-	}
-
-	/* set socket options for time stamping */
-	if (so_timestamp &&
-		setsockopt(sock, SOL_SOCKET, SO_TIMESTAMP,
-			   &enabled, sizeof(enabled)) < 0)
-		bail("setsockopt SO_TIMESTAMP");
-
-	if (so_timestampns &&
-		setsockopt(sock, SOL_SOCKET, SO_TIMESTAMPNS,
-			   &enabled, sizeof(enabled)) < 0)
-		bail("setsockopt SO_TIMESTAMPNS");
-
-	if (so_timestamping_flags &&
-		setsockopt(sock, SOL_SOCKET, SO_TIMESTAMPING,
-			   &so_timestamping_flags,
-			   sizeof(so_timestamping_flags)) < 0)
-		bail("setsockopt SO_TIMESTAMPING");
-
-	/* request IP_PKTINFO for debugging purposes */
-	if (setsockopt(sock, SOL_IP, IP_PKTINFO,
-		       &enabled, sizeof(enabled)) < 0)
-		printf("%s: %s\n", "setsockopt IP_PKTINFO", strerror(errno));
-
-	/* verify socket options */
-	len = sizeof(val);
-	if (getsockopt(sock, SOL_SOCKET, SO_TIMESTAMP, &val, &len) < 0)
-		printf("%s: %s\n", "getsockopt SO_TIMESTAMP", strerror(errno));
-	else
-		printf("SO_TIMESTAMP %d\n", val);
-
-	if (getsockopt(sock, SOL_SOCKET, SO_TIMESTAMPNS, &val, &len) < 0)
-		printf("%s: %s\n", "getsockopt SO_TIMESTAMPNS",
-		       strerror(errno));
-	else
-		printf("SO_TIMESTAMPNS %d\n", val);
-
-	if (getsockopt(sock, SOL_SOCKET, SO_TIMESTAMPING, &val, &len) < 0) {
-		printf("%s: %s\n", "getsockopt SO_TIMESTAMPING",
-		       strerror(errno));
-	} else {
-		printf("SO_TIMESTAMPING %d\n", val);
-		if (val != so_timestamping_flags)
-			printf("   not the expected value %d\n",
-			       so_timestamping_flags);
-	}
-
-	/* send packets forever every five seconds */
-	gettimeofday(&next, 0);
-	next.tv_sec = (next.tv_sec + 1) / 5 * 5;
-	next.tv_usec = 0;
-	while (1) {
-		struct timeval now;
-		struct timeval delta;
-		long delta_us;
-		int res;
-		fd_set readfs, errorfs;
-
-		gettimeofday(&now, 0);
-		delta_us = (long)(next.tv_sec - now.tv_sec) * 1000000 +
-			(long)(next.tv_usec - now.tv_usec);
-		if (delta_us > 0) {
-			/* continue waiting for timeout or data */
-			delta.tv_sec = delta_us / 1000000;
-			delta.tv_usec = delta_us % 1000000;
-
-			FD_ZERO(&readfs);
-			FD_ZERO(&errorfs);
-			FD_SET(sock, &readfs);
-			FD_SET(sock, &errorfs);
-			printf("%ld.%06ld: select %ldus\n",
-			       (long)now.tv_sec, (long)now.tv_usec,
-			       delta_us);
-			res = select(sock + 1, &readfs, 0, &errorfs, &delta);
-			gettimeofday(&now, 0);
-			printf("%ld.%06ld: select returned: %d, %s\n",
-			       (long)now.tv_sec, (long)now.tv_usec,
-			       res,
-			       res < 0 ? strerror(errno) : "success");
-			if (res > 0) {
-				if (FD_ISSET(sock, &readfs))
-					printf("ready for reading\n");
-				if (FD_ISSET(sock, &errorfs))
-					printf("has error\n");
-				recvpacket(sock, 0,
-					   siocgstamp,
-					   siocgstampns);
-				recvpacket(sock, MSG_ERRQUEUE,
-					   siocgstamp,
-					   siocgstampns);
-			}
-		} else {
-			/* write one packet */
-			sendpacket(sock,
-				   (struct sockaddr *)&addr,
-				   sizeof(addr));
-			next.tv_sec += 5;
-			continue;
-		}
-	}
-
-	return 0;
-}
diff --git a/Documentation/networking/timestamping/txtimestamp.c b/Documentation/networking/timestamping/txtimestamp.c
deleted file mode 100644
index b32fc2a07734..000000000000
--- a/Documentation/networking/timestamping/txtimestamp.c
+++ /dev/null
@@ -1,469 +0,0 @@
-/*
- * Copyright 2014 Google Inc.
- * Author: willemb@...gle.com (Willem de Bruijn)
- *
- * Test software tx timestamping, including
- *
- * - SCHED, SND and ACK timestamps
- * - RAW, UDP and TCP
- * - IPv4 and IPv6
- * - various packet sizes (to test GSO and TSO)
- *
- * Consult the command line arguments for help on running
- * the various testcases.
- *
- * This test requires a dummy TCP server.
- * A simple `nc6 [-u] -l -p $DESTPORT` will do
- *
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <arpa/inet.h>
-#include <asm/types.h>
-#include <error.h>
-#include <errno.h>
-#include <linux/errqueue.h>
-#include <linux/if_ether.h>
-#include <linux/net_tstamp.h>
-#include <netdb.h>
-#include <net/if.h>
-#include <netinet/in.h>
-#include <netinet/ip.h>
-#include <netinet/udp.h>
-#include <netinet/tcp.h>
-#include <netpacket/packet.h>
-#include <poll.h>
-#include <stdarg.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/select.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <time.h>
-#include <unistd.h>
-
-/* command line parameters */
-static int cfg_proto = SOCK_STREAM;
-static int cfg_ipproto = IPPROTO_TCP;
-static int cfg_num_pkts = 4;
-static int do_ipv4 = 1;
-static int do_ipv6 = 1;
-static int cfg_payload_len = 10;
-static uint16_t dest_port = 9000;
-
-static struct sockaddr_in daddr;
-static struct sockaddr_in6 daddr6;
-static struct timespec ts_prev;
-
-static void __print_timestamp(const char *name, struct timespec *cur,
-			      uint32_t key, int payload_len)
-{
-	if (!(cur->tv_sec | cur->tv_nsec))
-		return;
-
-	fprintf(stderr, "  %s: %lu s %lu us (seq=%u, len=%u)",
-			name, cur->tv_sec, cur->tv_nsec / 1000,
-			key, payload_len);
-
-	if ((ts_prev.tv_sec | ts_prev.tv_nsec)) {
-		int64_t cur_ms, prev_ms;
-
-		cur_ms = (long) cur->tv_sec * 1000 * 1000;
-		cur_ms += cur->tv_nsec / 1000;
-
-		prev_ms = (long) ts_prev.tv_sec * 1000 * 1000;
-		prev_ms += ts_prev.tv_nsec / 1000;
-
-		fprintf(stderr, "  (%+ld us)", cur_ms - prev_ms);
-	}
-
-	ts_prev = *cur;
-	fprintf(stderr, "\n");
-}
-
-static void print_timestamp_usr(void)
-{
-	struct timespec ts;
-	struct timeval tv;	/* avoid dependency on -lrt */
-
-	gettimeofday(&tv, NULL);
-	ts.tv_sec = tv.tv_sec;
-	ts.tv_nsec = tv.tv_usec * 1000;
-
-	__print_timestamp("  USR", &ts, 0, 0);
-}
-
-static void print_timestamp(struct scm_timestamping *tss, int tstype,
-			    int tskey, int payload_len)
-{
-	const char *tsname;
-
-	switch (tstype) {
-	case SCM_TSTAMP_SCHED:
-		tsname = "  ENQ";
-		break;
-	case SCM_TSTAMP_SND:
-		tsname = "  SND";
-		break;
-	case SCM_TSTAMP_ACK:
-		tsname = "  ACK";
-		break;
-	default:
-		error(1, 0, "unknown timestamp type: %u",
-		tstype);
-	}
-	__print_timestamp(tsname, &tss->ts[0], tskey, payload_len);
-}
-
-static void __poll(int fd)
-{
-	struct pollfd pollfd;
-	int ret;
-
-	memset(&pollfd, 0, sizeof(pollfd));
-	pollfd.fd = fd;
-	ret = poll(&pollfd, 1, 100);
-	if (ret != 1)
-		error(1, errno, "poll");
-}
-
-static void __recv_errmsg_cmsg(struct msghdr *msg, int payload_len)
-{
-	struct sock_extended_err *serr = NULL;
-	struct scm_timestamping *tss = NULL;
-	struct cmsghdr *cm;
-
-	for (cm = CMSG_FIRSTHDR(msg);
-	     cm && cm->cmsg_len;
-	     cm = CMSG_NXTHDR(msg, cm)) {
-		if (cm->cmsg_level == SOL_SOCKET &&
-		    cm->cmsg_type == SCM_TIMESTAMPING) {
-			tss = (void *) CMSG_DATA(cm);
-		} else if ((cm->cmsg_level == SOL_IP &&
-		     cm->cmsg_type == IP_RECVERR) ||
-		    (cm->cmsg_level == SOL_IPV6 &&
-		     cm->cmsg_type == IPV6_RECVERR)) {
-
-			serr = (void *) CMSG_DATA(cm);
-			if (serr->ee_errno != ENOMSG ||
-			    serr->ee_origin != SO_EE_ORIGIN_TIMESTAMPING) {
-				fprintf(stderr, "unknown ip error %d %d\n",
-						serr->ee_errno,
-						serr->ee_origin);
-				serr = NULL;
-			}
-		} else
-			fprintf(stderr, "unknown cmsg %d,%d\n",
-					cm->cmsg_level, cm->cmsg_type);
-	}
-
-	if (serr && tss)
-		print_timestamp(tss, serr->ee_info, serr->ee_data, payload_len);
-}
-
-static int recv_errmsg(int fd)
-{
-	static char ctrl[1024 /* overprovision*/];
-	static struct msghdr msg;
-	struct iovec entry;
-	static char *data;
-	int ret = 0;
-
-	data = malloc(cfg_payload_len);
-	if (!data)
-		error(1, 0, "malloc");
-
-	memset(&msg, 0, sizeof(msg));
-	memset(&entry, 0, sizeof(entry));
-	memset(ctrl, 0, sizeof(ctrl));
-
-	entry.iov_base = data;
-	entry.iov_len = cfg_payload_len;
-	msg.msg_iov = &entry;
-	msg.msg_iovlen = 1;
-	msg.msg_name = NULL;
-	msg.msg_namelen = 0;
-	msg.msg_control = ctrl;
-	msg.msg_controllen = sizeof(ctrl);
-
-	ret = recvmsg(fd, &msg, MSG_ERRQUEUE);
-	if (ret == -1 && errno != EAGAIN)
-		error(1, errno, "recvmsg");
-
-	__recv_errmsg_cmsg(&msg, ret);
-
-	free(data);
-	return ret == -1;
-}
-
-static void do_test(int family, unsigned int opt)
-{
-	char *buf;
-	int fd, i, val, total_len;
-
-	if (family == IPPROTO_IPV6 && cfg_proto != SOCK_STREAM) {
-		/* due to lack of checksum generation code */
-		fprintf(stderr, "test: skipping datagram over IPv6\n");
-		return;
-	}
-
-	total_len = cfg_payload_len;
-	if (cfg_proto == SOCK_RAW) {
-		total_len += sizeof(struct udphdr);
-		if (cfg_ipproto == IPPROTO_RAW)
-			total_len += sizeof(struct iphdr);
-	}
-
-	buf = malloc(total_len);
-	if (!buf)
-		error(1, 0, "malloc");
-
-	fd = socket(family, cfg_proto, cfg_ipproto);
-	if (fd < 0)
-		error(1, errno, "socket");
-
-	if (cfg_proto == SOCK_STREAM) {
-		val = 1;
-		if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY,
-			       (char*) &val, sizeof(val)))
-			error(1, 0, "setsockopt no nagle");
-
-		if (family == PF_INET) {
-			if (connect(fd, (void *) &daddr, sizeof(daddr)))
-				error(1, errno, "connect ipv4");
-		} else {
-			if (connect(fd, (void *) &daddr6, sizeof(daddr6)))
-				error(1, errno, "connect ipv6");
-		}
-	}
-
-	opt |= SOF_TIMESTAMPING_SOFTWARE |
-	       SOF_TIMESTAMPING_OPT_ID;
-	if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING,
-		       (char *) &opt, sizeof(opt)))
-		error(1, 0, "setsockopt timestamping");
-
-	for (i = 0; i < cfg_num_pkts; i++) {
-		memset(&ts_prev, 0, sizeof(ts_prev));
-		memset(buf, 'a' + i, total_len);
-		buf[total_len - 2] = '\n';
-		buf[total_len - 1] = '\0';
-
-		if (cfg_proto == SOCK_RAW) {
-			struct udphdr *udph;
-			int off = 0;
-
-			if (cfg_ipproto == IPPROTO_RAW) {
-				struct iphdr *iph = (void *) buf;
-
-				memset(iph, 0, sizeof(*iph));
-				iph->ihl      = 5;
-				iph->version  = 4;
-				iph->ttl      = 2;
-				iph->daddr    = daddr.sin_addr.s_addr;
-				iph->protocol = IPPROTO_UDP;
-				/* kernel writes saddr, csum, len */
-
-				off = sizeof(*iph);
-			}
-
-			udph = (void *) buf + off;
-			udph->source = ntohs(9000); 	/* random spoof */
-			udph->dest   = ntohs(dest_port);
-			udph->len    = ntohs(sizeof(*udph) + cfg_payload_len);
-			udph->check  = 0;	/* not allowed for IPv6 */
-		}
-
-		print_timestamp_usr();
-		if (cfg_proto != SOCK_STREAM) {
-			if (family == PF_INET)
-				val = sendto(fd, buf, total_len, 0, (void *) &daddr, sizeof(daddr));
-			else
-				val = sendto(fd, buf, total_len, 0, (void *) &daddr6, sizeof(daddr6));
-		} else {
-			val = send(fd, buf, cfg_payload_len, 0);
-		}
-		if (val != total_len)
-			error(1, errno, "send");
-
-		/* wait for all errors to be queued, else ACKs arrive OOO */
-		usleep(50 * 1000);
-
-		__poll(fd);
-
-		while (!recv_errmsg(fd)) {}
-	}
-
-	if (close(fd))
-		error(1, errno, "close");
-
-	free(buf);
-	usleep(400 * 1000);
-}
-
-static void __attribute__((noreturn)) usage(const char *filepath)
-{
-	fprintf(stderr, "\nUsage: %s [options] hostname\n"
-			"\nwhere options are:\n"
-			"  -4:   only IPv4\n"
-			"  -6:   only IPv6\n"
-			"  -h:   show this message\n"
-			"  -l N: send N bytes at a time\n"
-			"  -r:   use raw\n"
-			"  -R:   use raw (IP_HDRINCL)\n"
-			"  -p N: connect to port N\n"
-			"  -u:   use udp\n",
-			filepath);
-	exit(1);
-}
-
-static void parse_opt(int argc, char **argv)
-{
-	int proto_count = 0;
-	char c;
-
-	while ((c = getopt(argc, argv, "46hl:p:rRu")) != -1) {
-		switch (c) {
-		case '4':
-			do_ipv6 = 0;
-			break;
-		case '6':
-			do_ipv4 = 0;
-			break;
-		case 'r':
-			proto_count++;
-			cfg_proto = SOCK_RAW;
-			cfg_ipproto = IPPROTO_UDP;
-			break;
-		case 'R':
-			proto_count++;
-			cfg_proto = SOCK_RAW;
-			cfg_ipproto = IPPROTO_RAW;
-			break;
-		case 'u':
-			proto_count++;
-			cfg_proto = SOCK_DGRAM;
-			cfg_ipproto = IPPROTO_UDP;
-			break;
-		case 'l':
-			cfg_payload_len = strtoul(optarg, NULL, 10);
-			break;
-		case 'p':
-			dest_port = strtoul(optarg, NULL, 10);
-			break;
-		case 'h':
-		default:
-			usage(argv[0]);
-		}
-	}
-
-	if (!cfg_payload_len)
-		error(1, 0, "payload may not be nonzero");
-	if (cfg_proto != SOCK_STREAM && cfg_payload_len > 1472)
-		error(1, 0, "udp packet might exceed expected MTU");
-	if (!do_ipv4 && !do_ipv6)
-		error(1, 0, "pass -4 or -6, not both");
-	if (proto_count > 1)
-		error(1, 0, "pass -r, -R or -u, not multiple");
-
-	if (optind != argc - 1)
-		error(1, 0, "missing required hostname argument");
-}
-
-static void resolve_hostname(const char *hostname)
-{
-	struct addrinfo *addrs, *cur;
-	int have_ipv4 = 0, have_ipv6 = 0;
-
-	if (getaddrinfo(hostname, NULL, NULL, &addrs))
-		error(1, errno, "getaddrinfo");
-
-	cur = addrs;
-	while (cur && !have_ipv4 && !have_ipv6) {
-		if (!have_ipv4 && cur->ai_family == AF_INET) {
-			memcpy(&daddr, cur->ai_addr, sizeof(daddr));
-			daddr.sin_port = htons(dest_port);
-			have_ipv4 = 1;
-		}
-		else if (!have_ipv6 && cur->ai_family == AF_INET6) {
-			memcpy(&daddr6, cur->ai_addr, sizeof(daddr6));
-			daddr6.sin6_port = htons(dest_port);
-			have_ipv6 = 1;
-		}
-		cur = cur->ai_next;
-	}
-	if (addrs)
-		freeaddrinfo(addrs);
-
-	do_ipv4 &= have_ipv4;
-	do_ipv6 &= have_ipv6;
-}
-
-static void do_main(int family)
-{
-	fprintf(stderr, "family:       %s\n",
-			family == PF_INET ? "INET" : "INET6");
-
-	fprintf(stderr, "test SND\n");
-	do_test(family, SOF_TIMESTAMPING_TX_SOFTWARE);
-
-	fprintf(stderr, "test ENQ\n");
-	do_test(family, SOF_TIMESTAMPING_TX_SCHED);
-
-	fprintf(stderr, "test ENQ + SND\n");
-	do_test(family, SOF_TIMESTAMPING_TX_SCHED |
-			SOF_TIMESTAMPING_TX_SOFTWARE);
-
-	if (cfg_proto == SOCK_STREAM) {
-		fprintf(stderr, "\ntest ACK\n");
-		do_test(family, SOF_TIMESTAMPING_TX_ACK);
-
-		fprintf(stderr, "\ntest SND + ACK\n");
-		do_test(family, SOF_TIMESTAMPING_TX_SOFTWARE |
-				SOF_TIMESTAMPING_TX_ACK);
-
-		fprintf(stderr, "\ntest ENQ + SND + ACK\n");
-		do_test(family, SOF_TIMESTAMPING_TX_SCHED |
-				SOF_TIMESTAMPING_TX_SOFTWARE |
-				SOF_TIMESTAMPING_TX_ACK);
-	}
-}
-
-const char *sock_names[] = { NULL, "TCP", "UDP", "RAW" };
-
-int main(int argc, char **argv)
-{
-	if (argc == 1)
-		usage(argv[0]);
-
-	parse_opt(argc, argv);
-	resolve_hostname(argv[argc - 1]);
-
-	fprintf(stderr, "protocol:     %s\n", sock_names[cfg_proto]);
-	fprintf(stderr, "payload:      %u\n", cfg_payload_len);
-	fprintf(stderr, "server port:  %u\n", dest_port);
-	fprintf(stderr, "\n");
-
-	if (do_ipv4)
-		do_main(PF_INET);
-	if (do_ipv6)
-		do_main(PF_INET6);
-
-	return 0;
-}
diff --git a/Makefile b/Makefile
index 7c4915be1414..eadc962a80ab 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 VERSION = 3
 PATCHLEVEL = 18
-SUBLEVEL = 129
+SUBLEVEL = 130
 EXTRAVERSION =
 NAME = Diseased Newt
 
diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 2aab761ee68d..a5e9a80077a9 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -511,6 +511,9 @@ static void modem_pm(struct uart_port *port, unsigned int state, unsigned old)
 {
 	struct modem_private_data *priv = port->private_data;
 
+	if (!priv)
+		return;
+
 	if (IS_ERR(priv->regulator))
 		return;
 
diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c
index 0958d070d3db..46e29afe1c09 100644
--- a/arch/arm/mach-omap2/prm44xx.c
+++ b/arch/arm/mach-omap2/prm44xx.c
@@ -333,7 +333,7 @@ void omap44xx_prm_reconfigure_io_chain(void)
  * to occur, WAKEUPENABLE bits must be set in the pad mux registers, and
  * omap44xx_prm_reconfigure_io_chain() must be called.  No return value.
  */
-static void __init omap44xx_prm_enable_io_wakeup(void)
+static void omap44xx_prm_enable_io_wakeup(void)
 {
 	s32 inst = omap4_prmst_get_prm_dev_inst();
 
diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c
index 56fdad479115..2cf1483246b6 100644
--- a/arch/s390/kernel/perf_cpum_cf.c
+++ b/arch/s390/kernel/perf_cpum_cf.c
@@ -338,6 +338,8 @@ static int __hw_perf_event_init(struct perf_event *event)
 		break;
 
 	case PERF_TYPE_HARDWARE:
+		if (is_sampling_event(event))	/* No sampling support */
+			return -ENOENT;
 		ev = attr->config;
 		/* Count user space (problem-state) only */
 		if (!attr->exclude_user && attr->exclude_kernel) {
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index de8e50040124..02f13bb5bb71 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -55,7 +55,7 @@
 #define APIC_BUS_CYCLE_NS 1
 
 /* #define apic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) */
-#define apic_debug(fmt, arg...)
+#define apic_debug(fmt, arg...) do {} while (0)
 
 #define APIC_LVT_NUM			6
 /* 14 is the version for Xeon and Pentium 8.4.8*/
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index a43d81b6d5d1..ba5149a0cb23 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -965,9 +965,21 @@ static int get_clock(void *i2c_priv)
 {
 	struct ast_i2c_chan *i2c = i2c_priv;
 	struct ast_private *ast = i2c->dev->dev_private;
-	uint32_t val;
+	uint32_t val, val2, count, pass;
+
+	count = 0;
+	pass = 0;
+	val = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x10) >> 4) & 0x01;
+	do {
+		val2 = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x10) >> 4) & 0x01;
+		if (val == val2) {
+			pass++;
+		} else {
+			pass = 0;
+			val = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x10) >> 4) & 0x01;
+		}
+	} while ((pass < 5) && (count++ < 0x10000));
 
-	val = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x10) >> 4;
 	return val & 1 ? 1 : 0;
 }
 
@@ -975,9 +987,21 @@ static int get_data(void *i2c_priv)
 {
 	struct ast_i2c_chan *i2c = i2c_priv;
 	struct ast_private *ast = i2c->dev->dev_private;
-	uint32_t val;
+	uint32_t val, val2, count, pass;
+
+	count = 0;
+	pass = 0;
+	val = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x20) >> 5) & 0x01;
+	do {
+		val2 = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x20) >> 5) & 0x01;
+		if (val == val2) {
+			pass++;
+		} else {
+			pass = 0;
+			val = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x20) >> 5) & 0x01;
+		}
+	} while ((pass < 5) && (count++ < 0x10000));
 
-	val = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x20) >> 5;
 	return val & 1 ? 1 : 0;
 }
 
@@ -990,7 +1014,7 @@ static void set_clock(void *i2c_priv, int clock)
 
 	for (i = 0; i < 0x10000; i++) {
 		ujcrb7 = ((clock & 0x01) ? 0 : 1);
-		ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0xfe, ujcrb7);
+		ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0xf4, ujcrb7);
 		jtemp = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x01);
 		if (ujcrb7 == jtemp)
 			break;
@@ -1006,7 +1030,7 @@ static void set_data(void *i2c_priv, int data)
 
 	for (i = 0; i < 0x10000; i++) {
 		ujcrb7 = ((data & 0x01) ? 0 : 1) << 2;
-		ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0xfb, ujcrb7);
+		ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0xf1, ujcrb7);
 		jtemp = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x04);
 		if (ujcrb7 == jtemp)
 			break;
diff --git a/drivers/hwmon/w83795.c b/drivers/hwmon/w83795.c
index 21894131190f..9b838fff7e4d 100644
--- a/drivers/hwmon/w83795.c
+++ b/drivers/hwmon/w83795.c
@@ -1693,7 +1693,7 @@ store_sf_setup(struct device *dev, struct device_attribute *attr,
  * somewhere else in the code
  */
 #define SENSOR_ATTR_TEMP(index) {					\
-	SENSOR_ATTR_2(temp##index##_type, S_IRUGO | (index < 4 ? S_IWUSR : 0), \
+	SENSOR_ATTR_2(temp##index##_type, S_IRUGO | (index < 5 ? S_IWUSR : 0), \
 		show_temp_mode, store_temp_mode, NOT_USED, index - 1),	\
 	SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,		\
 		NULL, TEMP_READ, index - 1),				\
diff --git a/drivers/net/ethernet/realtek/8139cp.c b/drivers/net/ethernet/realtek/8139cp.c
index 75b1693ec8bf..1c0c1a28161c 100644
--- a/drivers/net/ethernet/realtek/8139cp.c
+++ b/drivers/net/ethernet/realtek/8139cp.c
@@ -576,6 +576,7 @@ static irqreturn_t cp_interrupt (int irq, void *dev_instance)
 	struct cp_private *cp;
 	int handled = 0;
 	u16 status;
+	u16 mask;
 
 	if (unlikely(dev == NULL))
 		return IRQ_NONE;
@@ -583,6 +584,10 @@ static irqreturn_t cp_interrupt (int irq, void *dev_instance)
 
 	spin_lock(&cp->lock);
 
+	mask = cpr16(IntrMask);
+	if (!mask)
+		goto out_unlock;
+
 	status = cpr16(IntrStatus);
 	if (!status || (status == 0xFFFF))
 		goto out_unlock;
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 7448ebe2c383..6338be5ede3d 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1423,9 +1423,9 @@ static void tun_setup(struct net_device *dev)
  */
 static int tun_validate(struct nlattr *tb[], struct nlattr *data[])
 {
-	if (!data)
-		return 0;
-	return -EINVAL;
+	/* NL_SET_ERR_MSG(extack,
+		       "tun/tap creation via rtnetlink is not supported."); */
+	return -EOPNOTSUPP;
 }
 
 static struct rtnl_link_ops tun_link_ops __read_mostly = {
diff --git a/drivers/staging/rts5208/sd.c b/drivers/staging/rts5208/sd.c
index c28a92773f05..f5633e55aa47 100644
--- a/drivers/staging/rts5208/sd.c
+++ b/drivers/staging/rts5208/sd.c
@@ -3531,9 +3531,6 @@ RTY_SEND_CMD:
 				if ((ptr[3] & 0x1E) != 0x04)
 					TRACE_RET(chip, STATUS_FAIL);
 
-			} else if (rsp_type == SD_RSP_TYPE_R0) {
-				if ((ptr[3] & 0x1E) != 0x03)
-					TRACE_RET(chip, STATUS_FAIL);
 			}
 		}
 	}
diff --git a/drivers/staging/speakup/kobjects.c b/drivers/staging/speakup/kobjects.c
index bcc7f62654f4..642416b9dd69 100644
--- a/drivers/staging/speakup/kobjects.c
+++ b/drivers/staging/speakup/kobjects.c
@@ -386,7 +386,7 @@ static ssize_t synth_store(struct kobject *kobj, struct kobj_attribute *attr,
 	len = strlen(buf);
 	if (len < 2 || len > 9)
 		return -EINVAL;
-	strncpy(new_synth_name, buf, len);
+	memcpy(new_synth_name, buf, len);
 	if (new_synth_name[len - 1] == '\n')
 		len--;
 	new_synth_name[len] = '\0';
@@ -513,7 +513,7 @@ static ssize_t punc_store(struct kobject *kobj, struct kobj_attribute *attr,
 		return -EINVAL;
 	}
 
-	strncpy(punc_buf, buf, x);
+	memcpy(punc_buf, buf, x);
 
 	while (x && punc_buf[x - 1] == '\n')
 		x--;
diff --git a/drivers/usb/gadget/udc/omap_udc.c b/drivers/usb/gadget/udc/omap_udc.c
index dcdfea46003b..1a457dd8c7f7 100644
--- a/drivers/usb/gadget/udc/omap_udc.c
+++ b/drivers/usb/gadget/udc/omap_udc.c
@@ -2037,6 +2037,7 @@ static inline int machine_without_vbus_sense(void)
 {
 	return machine_is_omap_innovator()
 		|| machine_is_omap_osk()
+		|| machine_is_omap_palmte()
 		|| machine_is_sx1()
 		/* No known omap7xx boards with vbus sense */
 		|| cpu_is_omap7xx();
@@ -2045,7 +2046,7 @@ static inline int machine_without_vbus_sense(void)
 static int omap_udc_start(struct usb_gadget *g,
 		struct usb_gadget_driver *driver)
 {
-	int		status = -ENODEV;
+	int		status;
 	struct omap_ep	*ep;
 	unsigned long	flags;
 
@@ -2083,6 +2084,7 @@ static int omap_udc_start(struct usb_gadget *g,
 			goto done;
 		}
 	} else {
+		status = 0;
 		if (can_pullup(udc))
 			pullup_enable(udc);
 		else
@@ -2591,9 +2593,22 @@ omap_ep_setup(char *name, u8 addr, u8 type,
 
 static void omap_udc_release(struct device *dev)
 {
-	complete(udc->done);
+	pullup_disable(udc);
+	if (!IS_ERR_OR_NULL(udc->transceiver)) {
+		usb_put_phy(udc->transceiver);
+		udc->transceiver = NULL;
+	}
+	omap_writew(0, UDC_SYSCON1);
+	remove_proc_file();
+	if (udc->dc_clk) {
+		if (udc->clk_requested)
+			omap_udc_enable_clock(0);
+		clk_put(udc->hhc_clk);
+		clk_put(udc->dc_clk);
+	}
+	if (udc->done)
+		complete(udc->done);
 	kfree(udc);
-	udc = NULL;
 }
 
 static int
@@ -2865,8 +2880,8 @@ bad_on_1710:
 		udc->clr_halt = UDC_RESET_EP;
 
 	/* USB general purpose IRQ:  ep0, state changes, dma, etc */
-	status = request_irq(pdev->resource[1].start, omap_udc_irq,
-			0, driver_name, udc);
+	status = devm_request_irq(&pdev->dev, pdev->resource[1].start,
+				  omap_udc_irq, 0, driver_name, udc);
 	if (status != 0) {
 		ERR("can't get irq %d, err %d\n",
 			(int) pdev->resource[1].start, status);
@@ -2874,20 +2889,20 @@ bad_on_1710:
 	}
 
 	/* USB "non-iso" IRQ (PIO for all but ep0) */
-	status = request_irq(pdev->resource[2].start, omap_udc_pio_irq,
-			0, "omap_udc pio", udc);
+	status = devm_request_irq(&pdev->dev, pdev->resource[2].start,
+				  omap_udc_pio_irq, 0, "omap_udc pio", udc);
 	if (status != 0) {
 		ERR("can't get irq %d, err %d\n",
 			(int) pdev->resource[2].start, status);
-		goto cleanup2;
+		goto cleanup1;
 	}
 #ifdef	USE_ISO
-	status = request_irq(pdev->resource[3].start, omap_udc_iso_irq,
-			0, "omap_udc iso", udc);
+	status = devm_request_irq(&pdev->dev, pdev->resource[3].start,
+				  omap_udc_iso_irq, 0, "omap_udc iso", udc);
 	if (status != 0) {
 		ERR("can't get irq %d, err %d\n",
 			(int) pdev->resource[3].start, status);
-		goto cleanup3;
+		goto cleanup1;
 	}
 #endif
 	if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
@@ -2898,23 +2913,8 @@ bad_on_1710:
 	}
 
 	create_proc_file();
-	status = usb_add_gadget_udc_release(&pdev->dev, &udc->gadget,
-			omap_udc_release);
-	if (status)
-		goto cleanup4;
-
-	return 0;
-
-cleanup4:
-	remove_proc_file();
-
-#ifdef	USE_ISO
-cleanup3:
-	free_irq(pdev->resource[2].start, udc);
-#endif
-
-cleanup2:
-	free_irq(pdev->resource[1].start, udc);
+	return usb_add_gadget_udc_release(&pdev->dev, &udc->gadget,
+					  omap_udc_release);
 
 cleanup1:
 	kfree(udc);
@@ -2941,42 +2941,15 @@ static int omap_udc_remove(struct platform_device *pdev)
 {
 	DECLARE_COMPLETION_ONSTACK(done);
 
-	if (!udc)
-		return -ENODEV;
-
-	usb_del_gadget_udc(&udc->gadget);
-	if (udc->driver)
-		return -EBUSY;
-
 	udc->done = &done;
 
-	pullup_disable(udc);
-	if (!IS_ERR_OR_NULL(udc->transceiver)) {
-		usb_put_phy(udc->transceiver);
-		udc->transceiver = NULL;
-	}
-	omap_writew(0, UDC_SYSCON1);
-
-	remove_proc_file();
-
-#ifdef	USE_ISO
-	free_irq(pdev->resource[3].start, udc);
-#endif
-	free_irq(pdev->resource[2].start, udc);
-	free_irq(pdev->resource[1].start, udc);
+	usb_del_gadget_udc(&udc->gadget);
 
-	if (udc->dc_clk) {
-		if (udc->clk_requested)
-			omap_udc_enable_clock(0);
-		clk_put(udc->hhc_clk);
-		clk_put(udc->dc_clk);
-	}
+	wait_for_completion(&done);
 
 	release_mem_region(pdev->resource[0].start,
 			pdev->resource[0].end - pdev->resource[0].start + 1);
 
-	wait_for_completion(&done);
-
 	return 0;
 }
 
diff --git a/drivers/video/fbdev/matrox/matroxfb_Ti3026.c b/drivers/video/fbdev/matrox/matroxfb_Ti3026.c
index 195ad7cac1ba..68fa037d8cbc 100644
--- a/drivers/video/fbdev/matrox/matroxfb_Ti3026.c
+++ b/drivers/video/fbdev/matrox/matroxfb_Ti3026.c
@@ -372,7 +372,7 @@ static int Ti3026_init(struct matrox_fb_info *minfo, struct my_timming *m)
 
 	DBG(__func__)
 
-	memcpy(hw->DACreg, MGADACbpp32, sizeof(hw->DACreg));
+	memcpy(hw->DACreg, MGADACbpp32, sizeof(MGADACbpp32));
 	switch (minfo->fbcon.var.bits_per_pixel) {
 		case 4:	hw->DACreg[POS3026_XLATCHCTRL] = TVP3026_XLATCHCTRL_16_1;	/* or _8_1, they are same */
 			hw->DACreg[POS3026_XTRUECOLORCTRL] = TVP3026_XTRUECOLORCTRL_PSEUDOCOLOR;
diff --git a/drivers/vme/bridges/vme_ca91cx42.c b/drivers/vme/bridges/vme_ca91cx42.c
index 18078ecbfcc6..78271c8721f8 100644
--- a/drivers/vme/bridges/vme_ca91cx42.c
+++ b/drivers/vme/bridges/vme_ca91cx42.c
@@ -468,7 +468,7 @@ static int ca91cx42_slave_get(struct vme_slave_resource *image, int *enabled,
 	vme_bound = ioread32(bridge->base + CA91CX42_VSI_BD[i]);
 	pci_offset = ioread32(bridge->base + CA91CX42_VSI_TO[i]);
 
-	*pci_base = (dma_addr_t)vme_base + pci_offset;
+	*pci_base = (dma_addr_t)*vme_base + pci_offset;
 	*size = (unsigned long long)((vme_bound - *vme_base) + granularity);
 
 	*enabled = 0;
diff --git a/drivers/vme/bridges/vme_ca91cx42.h b/drivers/vme/bridges/vme_ca91cx42.h
index d46b12dc3b82..d54119e59d55 100644
--- a/drivers/vme/bridges/vme_ca91cx42.h
+++ b/drivers/vme/bridges/vme_ca91cx42.h
@@ -547,7 +547,7 @@ static const int CA91CX42_LINT_LM[] = { CA91CX42_LINT_LM0, CA91CX42_LINT_LM1,
 #define CA91CX42_LM_CTL_DATA		(1<<22)
 #define CA91CX42_LM_CTL_SUPR		(1<<21)
 #define CA91CX42_LM_CTL_NPRIV		(1<<20)
-#define CA91CX42_LM_CTL_AS_M		(5<<16)
+#define CA91CX42_LM_CTL_AS_M		(7<<16)
 #define CA91CX42_LM_CTL_AS_A16		0
 #define CA91CX42_LM_CTL_AS_A24		(1<<16)
 #define CA91CX42_LM_CTL_AS_A32		(1<<17)
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index b0350e2ec518..e41bc7c9ba13 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -3255,7 +3255,8 @@ static void free_pending_move(struct send_ctx *sctx, struct pending_dir_move *m)
 	kfree(m);
 }
 
-static void tail_append_pending_moves(struct pending_dir_move *moves,
+static void tail_append_pending_moves(struct send_ctx *sctx,
+				      struct pending_dir_move *moves,
 				      struct list_head *stack)
 {
 	if (list_empty(&moves->list)) {
@@ -3266,6 +3267,10 @@ static void tail_append_pending_moves(struct pending_dir_move *moves,
 		list_add_tail(&moves->list, stack);
 		list_splice_tail(&list, stack);
 	}
+	if (!RB_EMPTY_NODE(&moves->node)) {
+		rb_erase(&moves->node, &sctx->pending_dir_moves);
+		RB_CLEAR_NODE(&moves->node);
+	}
 }
 
 static int apply_children_dir_moves(struct send_ctx *sctx)
@@ -3280,7 +3285,7 @@ static int apply_children_dir_moves(struct send_ctx *sctx)
 		return 0;
 
 	INIT_LIST_HEAD(&stack);
-	tail_append_pending_moves(pm, &stack);
+	tail_append_pending_moves(sctx, pm, &stack);
 
 	while (!list_empty(&stack)) {
 		pm = list_first_entry(&stack, struct pending_dir_move, list);
@@ -3291,7 +3296,7 @@ static int apply_children_dir_moves(struct send_ctx *sctx)
 			goto out;
 		pm = get_pending_dir_moves(sctx, parent_ino);
 		if (pm)
-			tail_append_pending_moves(pm, &stack);
+			tail_append_pending_moves(sctx, pm, &stack);
 	}
 	return 0;
 
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index a899e69cd5fd..4b3a6b01bb48 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -962,11 +962,8 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
 void cachefiles_uncache_page(struct fscache_object *_object, struct page *page)
 {
 	struct cachefiles_object *object;
-	struct cachefiles_cache *cache;
 
 	object = container_of(_object, struct cachefiles_object, fscache);
-	cache = container_of(object->fscache.cache,
-			     struct cachefiles_cache, cache);
 
 	_enter("%p,{%lu}", object, page->index);
 
diff --git a/fs/exec.c b/fs/exec.c
index 515081d66c60..becc3e12dd29 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1051,15 +1051,14 @@ killed:
 	return -EAGAIN;
 }
 
-char *get_task_comm(char *buf, struct task_struct *tsk)
+char *__get_task_comm(char *buf, size_t buf_size, struct task_struct *tsk)
 {
-	/* buf must be at least sizeof(tsk->comm) in size */
 	task_lock(tsk);
-	strncpy(buf, tsk->comm, sizeof(tsk->comm));
+	strncpy(buf, tsk->comm, buf_size);
 	task_unlock(tsk);
 	return buf;
 }
-EXPORT_SYMBOL_GPL(get_task_comm);
+EXPORT_SYMBOL_GPL(__get_task_comm);
 
 /*
  * These functions flushes out all traces of the currently running executable
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index a3aa6baad1a1..d4dcf3cc076a 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -76,7 +76,7 @@ static bool dentry_connected(struct dentry *dentry)
 		struct dentry *parent = dget_parent(dentry);
 
 		dput(dentry);
-		if (IS_ROOT(dentry)) {
+		if (dentry == parent) {
 			dput(parent);
 			return false;
 		}
diff --git a/fs/fscache/object.c b/fs/fscache/object.c
index da032daf0e0d..f878db8710f8 100644
--- a/fs/fscache/object.c
+++ b/fs/fscache/object.c
@@ -691,6 +691,9 @@ static const struct fscache_state *fscache_drop_object(struct fscache_object *ob
 
 	if (awaken)
 		wake_up_bit(&cookie->flags, FSCACHE_COOKIE_INVALIDATING);
+	if (test_and_clear_bit(FSCACHE_COOKIE_LOOKING_UP, &cookie->flags))
+		wake_up_bit(&cookie->flags, FSCACHE_COOKIE_LOOKING_UP);
+
 
 	/* Prevent a race with our last child, which has to signal EV_CLEARED
 	 * before dropping our spinlock.
diff --git a/fs/hfs/btree.c b/fs/hfs/btree.c
index 1ab19e660e69..1ff5774a5382 100644
--- a/fs/hfs/btree.c
+++ b/fs/hfs/btree.c
@@ -328,13 +328,14 @@ void hfs_bmap_free(struct hfs_bnode *node)
 
 		nidx -= len * 8;
 		i = node->next;
-		hfs_bnode_put(node);
 		if (!i) {
 			/* panic */;
 			pr_crit("unable to free bnode %u. bmap not found!\n",
 				node->this);
+			hfs_bnode_put(node);
 			return;
 		}
+		hfs_bnode_put(node);
 		node = hfs_bnode_find(tree, i);
 		if (IS_ERR(node))
 			return;
diff --git a/fs/hfsplus/btree.c b/fs/hfsplus/btree.c
index 3345c7553edc..7adc8a327e03 100644
--- a/fs/hfsplus/btree.c
+++ b/fs/hfsplus/btree.c
@@ -453,14 +453,15 @@ void hfs_bmap_free(struct hfs_bnode *node)
 
 		nidx -= len * 8;
 		i = node->next;
-		hfs_bnode_put(node);
 		if (!i) {
 			/* panic */;
 			pr_crit("unable to free bnode %u. "
 					"bmap not found!\n",
 				node->this);
+			hfs_bnode_put(node);
 			return;
 		}
+		hfs_bnode_put(node);
 		node = hfs_bnode_find(tree, i);
 		if (IS_ERR(node))
 			return;
diff --git a/fs/ocfs2/export.c b/fs/ocfs2/export.c
index 29651167190d..01ac16b3feac 100644
--- a/fs/ocfs2/export.c
+++ b/fs/ocfs2/export.c
@@ -125,10 +125,10 @@ check_err:
 
 check_gen:
 	if (handle->ih_generation != inode->i_generation) {
-		iput(inode);
 		trace_ocfs2_get_dentry_generation((unsigned long long)blkno,
 						  handle->ih_generation,
 						  inode->i_generation);
+		iput(inode);
 		result = ERR_PTR(-ESTALE);
 		goto bail;
 	}
diff --git a/fs/ocfs2/move_extents.c b/fs/ocfs2/move_extents.c
index 74caffeeee1d..51b7ab554208 100644
--- a/fs/ocfs2/move_extents.c
+++ b/fs/ocfs2/move_extents.c
@@ -158,18 +158,14 @@ out:
 }
 
 /*
- * lock allocators, and reserving appropriate number of bits for
- * meta blocks and data clusters.
- *
- * in some cases, we don't need to reserve clusters, just let data_ac
- * be NULL.
+ * lock allocator, and reserve appropriate number of bits for
+ * meta blocks.
  */
-static int ocfs2_lock_allocators_move_extents(struct inode *inode,
+static int ocfs2_lock_meta_allocator_move_extents(struct inode *inode,
 					struct ocfs2_extent_tree *et,
 					u32 clusters_to_move,
 					u32 extents_to_split,
 					struct ocfs2_alloc_context **meta_ac,
-					struct ocfs2_alloc_context **data_ac,
 					int extra_blocks,
 					int *credits)
 {
@@ -194,13 +190,6 @@ static int ocfs2_lock_allocators_move_extents(struct inode *inode,
 		goto out;
 	}
 
-	if (data_ac) {
-		ret = ocfs2_reserve_clusters(osb, clusters_to_move, data_ac);
-		if (ret) {
-			mlog_errno(ret);
-			goto out;
-		}
-	}
 
 	*credits += ocfs2_calc_extend_credits(osb->sb, et->et_root_el);
 
@@ -262,10 +251,10 @@ static int ocfs2_defrag_extent(struct ocfs2_move_extents_context *context,
 		}
 	}
 
-	ret = ocfs2_lock_allocators_move_extents(inode, &context->et, *len, 1,
-						 &context->meta_ac,
-						 &context->data_ac,
-						 extra_blocks, &credits);
+	ret = ocfs2_lock_meta_allocator_move_extents(inode, &context->et,
+						*len, 1,
+						&context->meta_ac,
+						extra_blocks, &credits);
 	if (ret) {
 		mlog_errno(ret);
 		goto out;
@@ -288,6 +277,21 @@ static int ocfs2_defrag_extent(struct ocfs2_move_extents_context *context,
 		}
 	}
 
+	/*
+	 * Make sure ocfs2_reserve_cluster is called after
+	 * __ocfs2_flush_truncate_log, otherwise, dead lock may happen.
+	 *
+	 * If ocfs2_reserve_cluster is called
+	 * before __ocfs2_flush_truncate_log, dead lock on global bitmap
+	 * may happen.
+	 *
+	 */
+	ret = ocfs2_reserve_clusters(osb, *len, &context->data_ac);
+	if (ret) {
+		mlog_errno(ret);
+		goto out_unlock_mutex;
+	}
+
 	handle = ocfs2_start_trans(osb, credits);
 	if (IS_ERR(handle)) {
 		ret = PTR_ERR(handle);
@@ -608,9 +612,10 @@ static int ocfs2_move_extent(struct ocfs2_move_extents_context *context,
 		}
 	}
 
-	ret = ocfs2_lock_allocators_move_extents(inode, &context->et, len, 1,
-						 &context->meta_ac,
-						 NULL, extra_blocks, &credits);
+	ret = ocfs2_lock_meta_allocator_move_extents(inode, &context->et,
+						len, 1,
+						&context->meta_ac,
+						extra_blocks, &credits);
 	if (ret) {
 		mlog_errno(ret);
 		goto out;
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 0a9b72cdfeca..75fc2b70fcdb 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -371,8 +371,8 @@ static void pstore_console_write(struct console *con, const char *s, unsigned c)
 		} else {
 			spin_lock_irqsave(&psinfo->buf_lock, flags);
 		}
-		memcpy(psinfo->buf, s, c);
-		psinfo->write(PSTORE_TYPE_CONSOLE, 0, &id, 0, 0, 0, c, psinfo);
+		psinfo->write_buf(PSTORE_TYPE_CONSOLE, 0, &id, 0,
+				  s, 0, c, psinfo);
 		spin_unlock_irqrestore(&psinfo->buf_lock, flags);
 		s += c;
 		c = e - s;
diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index 88956309cc86..9d26f2034d54 100644
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -281,7 +281,7 @@ static int __sysv_write_inode(struct inode *inode, int wait)
                 }
         }
 	brelse(bh);
-	return 0;
+	return err;
 }
 
 int sysv_write_inode(struct inode *inode, struct writeback_control *wbc)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4e41e629afb1..2102931db2b5 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2466,7 +2466,12 @@ static inline void set_task_comm(struct task_struct *tsk, const char *from)
 {
 	__set_task_comm(tsk, from, false);
 }
-extern char *get_task_comm(char *to, struct task_struct *tsk);
+
+extern char *__get_task_comm(char *to, size_t len, struct task_struct *tsk);
+#define get_task_comm(buf, tsk) ({			\
+	BUILD_BUG_ON(sizeof(buf) != TASK_COMM_LEN);	\
+	__get_task_comm(buf, sizeof(buf), tsk);		\
+})
 
 #ifdef CONFIG_SMP
 void scheduler_ipi(void);
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index f60558d0254c..0ea237bd38bd 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -389,6 +389,7 @@ static inline int neigh_hh_bridge(struct hh_cache *hh, struct sk_buff *skb)
 
 static inline int neigh_hh_output(const struct hh_cache *hh, struct sk_buff *skb)
 {
+	unsigned int hh_alen = 0;
 	unsigned int seq;
 	int hh_len;
 
@@ -396,16 +397,33 @@ static inline int neigh_hh_output(const struct hh_cache *hh, struct sk_buff *skb
 		seq = read_seqbegin(&hh->hh_lock);
 		hh_len = hh->hh_len;
 		if (likely(hh_len <= HH_DATA_MOD)) {
-			/* this is inlined by gcc */
-			memcpy(skb->data - HH_DATA_MOD, hh->hh_data, HH_DATA_MOD);
+			hh_alen = HH_DATA_MOD;
+
+			/* skb_push() would proceed silently if we have room for
+			 * the unaligned size but not for the aligned size:
+			 * check headroom explicitly.
+			 */
+			if (likely(skb_headroom(skb) >= HH_DATA_MOD)) {
+				/* this is inlined by gcc */
+				memcpy(skb->data - HH_DATA_MOD, hh->hh_data,
+				       HH_DATA_MOD);
+			}
 		} else {
-			int hh_alen = HH_DATA_ALIGN(hh_len);
+			hh_alen = HH_DATA_ALIGN(hh_len);
 
-			memcpy(skb->data - hh_alen, hh->hh_data, hh_alen);
+			if (likely(skb_headroom(skb) >= hh_alen)) {
+				memcpy(skb->data - hh_alen, hh->hh_data,
+				       hh_alen);
+			}
 		}
 	} while (read_seqretry(&hh->hh_lock, seq));
 
-	skb_push(skb, hh_len);
+	if (WARN_ON_ONCE(skb_headroom(skb) < hh_alen)) {
+		kfree_skb(skb);
+		return NET_XMIT_DROP;
+	}
+
+	__skb_push(skb, hh_len);
 	return dev_queue_xmit(skb);
 }
 
diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index a26328ec39f1..bb37541cd441 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -1088,7 +1088,8 @@ void __init debug_objects_mem_init(void)
 
 	obj_cache = kmem_cache_create("debug_objects_cache",
 				      sizeof (struct debug_obj), 0,
-				      SLAB_DEBUG_OBJECTS, NULL);
+				      SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE,
+				      NULL);
 
 	if (!obj_cache || debug_objects_replace_static_objects()) {
 		debug_objects_enabled = 0;
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 231c5822b9df..1e3bd39ed23f 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2594,6 +2594,9 @@ int ndo_dflt_fdb_dump(struct sk_buff *skb,
 {
 	int err;
 
+	if (dev->type != ARPHRD_ETHER)
+		return -EINVAL;
+
 	netif_addr_lock_bh(dev);
 	err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
 	if (err)
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 0c344ca515ab..2b69a4b965ed 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -159,37 +159,37 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct in6_addr *first_hop = &fl6->daddr;
 	struct dst_entry *dst = skb_dst(skb);
+	unsigned int head_room;
 	struct ipv6hdr *hdr;
 	u8  proto = fl6->flowi6_proto;
 	int seg_len = skb->len;
 	int hlimit = -1;
 	u32 mtu;
 
-	if (opt) {
-		unsigned int head_room;
+	head_room = sizeof(struct ipv6hdr) + LL_RESERVED_SPACE(dst->dev);
+	if (opt)
+		head_room += opt->opt_nflen + opt->opt_flen;
 
-		/* First: exthdrs may take lots of space (~8K for now)
-		   MAX_HEADER is not enough.
-		 */
-		head_room = opt->opt_nflen + opt->opt_flen;
-		seg_len += head_room;
-		head_room += sizeof(struct ipv6hdr) + LL_RESERVED_SPACE(dst->dev);
-
-		if (skb_headroom(skb) < head_room) {
-			struct sk_buff *skb2 = skb_realloc_headroom(skb, head_room);
-			if (skb2 == NULL) {
-				IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
-					      IPSTATS_MIB_OUTDISCARDS);
-				kfree_skb(skb);
-				return -ENOBUFS;
-			}
-			if (skb->sk)
-				skb_set_owner_w(skb2, skb->sk);
-			consume_skb(skb);
-			skb = skb2;
+	if (unlikely(skb_headroom(skb) < head_room)) {
+		struct sk_buff *skb2 = skb_realloc_headroom(skb, head_room);
+		if (!skb2) {
+			IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
+				      IPSTATS_MIB_OUTDISCARDS);
+			kfree_skb(skb);
+			return -ENOBUFS;
 		}
+		if (skb->sk)
+			skb_set_owner_w(skb2, skb->sk);
+		consume_skb(skb);
+		skb = skb2;
+	}
+
+	if (opt) {
+		seg_len += opt->opt_nflen + opt->opt_flen;
+
 		if (opt->opt_flen)
 			ipv6_push_frag_opts(skb, opt, &proto);
+
 		if (opt->opt_nflen)
 			ipv6_push_nfrag_opts(skb, opt, &proto, &first_hop);
 	}
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index f60db2b3e5ef..8ea3a4e78272 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -445,6 +445,9 @@ static int netem_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 	int count = 1;
 	int rc = NET_XMIT_SUCCESS;
 
+	/* Do not fool qdisc_drop_all() */
+	skb->prev = NULL;
+
 	/* Random duplication */
 	if (q->duplicate && q->duplicate >= get_crandom(&q->dup_cor))
 		++count;
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index f88d90f20228..ce12bd555fe7 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -739,7 +739,7 @@ int conf_write(const char *name)
 	struct menu *menu;
 	const char *basename;
 	const char *str;
-	char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
+	char dirname[PATH_MAX+1], tmpname[PATH_MAX+22], newname[PATH_MAX+8];
 	char *env;
 
 	dirname[0] = 0;
diff --git a/sound/soc/omap/omap-dmic.c b/sound/soc/omap/omap-dmic.c
index 0f34e28a3d55..750d821ffee5 100644
--- a/sound/soc/omap/omap-dmic.c
+++ b/sound/soc/omap/omap-dmic.c
@@ -48,6 +48,8 @@ struct omap_dmic {
 	struct device *dev;
 	void __iomem *io_base;
 	struct clk *fclk;
+	struct pm_qos_request pm_qos_req;
+	int latency;
 	int fclk_freq;
 	int out_freq;
 	int clk_div;
@@ -124,6 +126,8 @@ static void omap_dmic_dai_shutdown(struct snd_pcm_substream *substream,
 
 	mutex_lock(&dmic->mutex);
 
+	pm_qos_remove_request(&dmic->pm_qos_req);
+
 	if (!dai->active)
 		dmic->active = 0;
 
@@ -226,6 +230,8 @@ static int omap_dmic_dai_hw_params(struct snd_pcm_substream *substream,
 	/* packet size is threshold * channels */
 	dma_data = snd_soc_dai_get_dma_data(dai, substream);
 	dma_data->maxburst = dmic->threshold * channels;
+	dmic->latency = (OMAP_DMIC_THRES_MAX - dmic->threshold) * USEC_PER_SEC /
+			params_rate(params);
 
 	return 0;
 }
@@ -236,6 +242,9 @@ static int omap_dmic_dai_prepare(struct snd_pcm_substream *substream,
 	struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
 	u32 ctrl;
 
+	if (pm_qos_request_active(&dmic->pm_qos_req))
+		pm_qos_update_request(&dmic->pm_qos_req, dmic->latency);
+
 	/* Configure uplink threshold */
 	omap_dmic_write(dmic, OMAP_DMIC_FIFO_CTRL_REG, dmic->threshold);
 
diff --git a/sound/soc/omap/omap-mcpdm.c b/sound/soc/omap/omap-mcpdm.c
index f0e2ebeab02b..2f9931bb663a 100644
--- a/sound/soc/omap/omap-mcpdm.c
+++ b/sound/soc/omap/omap-mcpdm.c
@@ -54,6 +54,8 @@ struct omap_mcpdm {
 	unsigned long phys_base;
 	void __iomem *io_base;
 	int irq;
+	struct pm_qos_request pm_qos_req;
+	int latency[2];
 
 	struct mutex mutex;
 
@@ -273,6 +275,9 @@ static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream,
 				  struct snd_soc_dai *dai)
 {
 	struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai);
+	int tx = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
+	int stream1 = tx ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
+	int stream2 = tx ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
 
 	mutex_lock(&mcpdm->mutex);
 
@@ -285,6 +290,14 @@ static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream,
 		}
 	}
 
+	if (mcpdm->latency[stream2])
+		pm_qos_update_request(&mcpdm->pm_qos_req,
+				      mcpdm->latency[stream2]);
+	else if (mcpdm->latency[stream1])
+		pm_qos_remove_request(&mcpdm->pm_qos_req);
+
+	mcpdm->latency[stream1] = 0;
+
 	mutex_unlock(&mcpdm->mutex);
 }
 
@@ -296,7 +309,7 @@ static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream,
 	int stream = substream->stream;
 	struct snd_dmaengine_dai_dma_data *dma_data;
 	u32 threshold;
-	int channels;
+	int channels, latency;
 	int link_mask = 0;
 
 	channels = params_channels(params);
@@ -336,14 +349,25 @@ static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream,
 
 		dma_data->maxburst =
 				(MCPDM_DN_THRES_MAX - threshold) * channels;
+		latency = threshold;
 	} else {
 		/* If playback is not running assume a stereo stream to come */
 		if (!mcpdm->config[!stream].link_mask)
 			mcpdm->config[!stream].link_mask = (0x3 << 3);
 
 		dma_data->maxburst = threshold * channels;
+		latency = (MCPDM_DN_THRES_MAX - threshold);
 	}
 
+	/*
+	 * The DMA must act to a DMA request within latency time (usec) to avoid
+	 * under/overflow
+	 */
+	mcpdm->latency[stream] = latency * USEC_PER_SEC / params_rate(params);
+
+	if (!mcpdm->latency[stream])
+		mcpdm->latency[stream] = 10;
+
 	/* Check if we need to restart McPDM with this stream */
 	if (mcpdm->config[stream].link_mask &&
 	    mcpdm->config[stream].link_mask != link_mask)
@@ -358,6 +382,20 @@ static int omap_mcpdm_prepare(struct snd_pcm_substream *substream,
 				  struct snd_soc_dai *dai)
 {
 	struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai);
+	struct pm_qos_request *pm_qos_req = &mcpdm->pm_qos_req;
+	int tx = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
+	int stream1 = tx ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
+	int stream2 = tx ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
+	int latency = mcpdm->latency[stream2];
+
+	/* Prevent omap hardware from hitting off between FIFO fills */
+	if (!latency || mcpdm->latency[stream1] < latency)
+		latency = mcpdm->latency[stream1];
+
+	if (pm_qos_request_active(pm_qos_req))
+		pm_qos_update_request(pm_qos_req, latency);
+	else if (latency)
+		pm_qos_add_request(pm_qos_req, PM_QOS_CPU_DMA_LATENCY, latency);
 
 	if (!omap_mcpdm_active(mcpdm)) {
 		omap_mcpdm_start(mcpdm);
@@ -418,6 +456,9 @@ static int omap_mcpdm_remove(struct snd_soc_dai *dai)
 
 	pm_runtime_disable(mcpdm->dev);
 
+	if (pm_qos_request_active(&mcpdm->pm_qos_req))
+		pm_qos_remove_request(&mcpdm->pm_qos_req);
+
 	return 0;
 }
 
diff --git a/tools/testing/selftests/networking/timestamping/.gitignore b/tools/testing/selftests/networking/timestamping/.gitignore
new file mode 100644
index 000000000000..9e69e982fb38
--- /dev/null
+++ b/tools/testing/selftests/networking/timestamping/.gitignore
@@ -0,0 +1,3 @@
+timestamping
+txtimestamp
+hwtstamp_config
diff --git a/tools/testing/selftests/networking/timestamping/Makefile b/tools/testing/selftests/networking/timestamping/Makefile
new file mode 100644
index 000000000000..ccbb9edbbbb9
--- /dev/null
+++ b/tools/testing/selftests/networking/timestamping/Makefile
@@ -0,0 +1,8 @@
+TEST_PROGS := hwtstamp_config timestamping txtimestamp
+
+all: $(TEST_PROGS)
+
+include ../../lib.mk
+
+clean:
+	rm -fr $(TEST_PROGS)
diff --git a/tools/testing/selftests/networking/timestamping/hwtstamp_config.c b/tools/testing/selftests/networking/timestamping/hwtstamp_config.c
new file mode 100644
index 000000000000..e8b685a7f15f
--- /dev/null
+++ b/tools/testing/selftests/networking/timestamping/hwtstamp_config.c
@@ -0,0 +1,134 @@
+/* Test program for SIOC{G,S}HWTSTAMP
+ * Copyright 2013 Solarflare Communications
+ * Author: Ben Hutchings
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+
+#include <linux/if.h>
+#include <linux/net_tstamp.h>
+#include <linux/sockios.h>
+
+static int
+lookup_value(const char **names, int size, const char *name)
+{
+	int value;
+
+	for (value = 0; value < size; value++)
+		if (names[value] && strcasecmp(names[value], name) == 0)
+			return value;
+
+	return -1;
+}
+
+static const char *
+lookup_name(const char **names, int size, int value)
+{
+	return (value >= 0 && value < size) ? names[value] : NULL;
+}
+
+static void list_names(FILE *f, const char **names, int size)
+{
+	int value;
+
+	for (value = 0; value < size; value++)
+		if (names[value])
+			fprintf(f, "    %s\n", names[value]);
+}
+
+static const char *tx_types[] = {
+#define TX_TYPE(name) [HWTSTAMP_TX_ ## name] = #name
+	TX_TYPE(OFF),
+	TX_TYPE(ON),
+	TX_TYPE(ONESTEP_SYNC)
+#undef TX_TYPE
+};
+#define N_TX_TYPES ((int)(sizeof(tx_types) / sizeof(tx_types[0])))
+
+static const char *rx_filters[] = {
+#define RX_FILTER(name) [HWTSTAMP_FILTER_ ## name] = #name
+	RX_FILTER(NONE),
+	RX_FILTER(ALL),
+	RX_FILTER(SOME),
+	RX_FILTER(PTP_V1_L4_EVENT),
+	RX_FILTER(PTP_V1_L4_SYNC),
+	RX_FILTER(PTP_V1_L4_DELAY_REQ),
+	RX_FILTER(PTP_V2_L4_EVENT),
+	RX_FILTER(PTP_V2_L4_SYNC),
+	RX_FILTER(PTP_V2_L4_DELAY_REQ),
+	RX_FILTER(PTP_V2_L2_EVENT),
+	RX_FILTER(PTP_V2_L2_SYNC),
+	RX_FILTER(PTP_V2_L2_DELAY_REQ),
+	RX_FILTER(PTP_V2_EVENT),
+	RX_FILTER(PTP_V2_SYNC),
+	RX_FILTER(PTP_V2_DELAY_REQ),
+#undef RX_FILTER
+};
+#define N_RX_FILTERS ((int)(sizeof(rx_filters) / sizeof(rx_filters[0])))
+
+static void usage(void)
+{
+	fputs("Usage: hwtstamp_config if_name [tx_type rx_filter]\n"
+	      "tx_type is any of (case-insensitive):\n",
+	      stderr);
+	list_names(stderr, tx_types, N_TX_TYPES);
+	fputs("rx_filter is any of (case-insensitive):\n", stderr);
+	list_names(stderr, rx_filters, N_RX_FILTERS);
+}
+
+int main(int argc, char **argv)
+{
+	struct ifreq ifr;
+	struct hwtstamp_config config;
+	const char *name;
+	int sock;
+
+	if ((argc != 2 && argc != 4) || (strlen(argv[1]) >= IFNAMSIZ)) {
+		usage();
+		return 2;
+	}
+
+	if (argc == 4) {
+		config.flags = 0;
+		config.tx_type = lookup_value(tx_types, N_TX_TYPES, argv[2]);
+		config.rx_filter = lookup_value(rx_filters, N_RX_FILTERS, argv[3]);
+		if (config.tx_type < 0 || config.rx_filter < 0) {
+			usage();
+			return 2;
+		}
+	}
+
+	sock = socket(AF_INET, SOCK_DGRAM, 0);
+	if (sock < 0) {
+		perror("socket");
+		return 1;
+	}
+
+	strcpy(ifr.ifr_name, argv[1]);
+	ifr.ifr_data = (caddr_t)&config;
+
+	if (ioctl(sock, (argc == 2) ? SIOCGHWTSTAMP : SIOCSHWTSTAMP, &ifr)) {
+		perror("ioctl");
+		return 1;
+	}
+
+	printf("flags = %#x\n", config.flags);
+	name = lookup_name(tx_types, N_TX_TYPES, config.tx_type);
+	if (name)
+		printf("tx_type = %s\n", name);
+	else
+		printf("tx_type = %d\n", config.tx_type);
+	name = lookup_name(rx_filters, N_RX_FILTERS, config.rx_filter);
+	if (name)
+		printf("rx_filter = %s\n", name);
+	else
+		printf("rx_filter = %d\n", config.rx_filter);
+
+	return 0;
+}
diff --git a/tools/testing/selftests/networking/timestamping/timestamping.c b/tools/testing/selftests/networking/timestamping/timestamping.c
new file mode 100644
index 000000000000..5cdfd743447b
--- /dev/null
+++ b/tools/testing/selftests/networking/timestamping/timestamping.c
@@ -0,0 +1,528 @@
+/*
+ * This program demonstrates how the various time stamping features in
+ * the Linux kernel work. It emulates the behavior of a PTP
+ * implementation in stand-alone master mode by sending PTPv1 Sync
+ * multicasts once every second. It looks for similar packets, but
+ * beyond that doesn't actually implement PTP.
+ *
+ * Outgoing packets are time stamped with SO_TIMESTAMPING with or
+ * without hardware support.
+ *
+ * Incoming packets are time stamped with SO_TIMESTAMPING with or
+ * without hardware support, SIOCGSTAMP[NS] (per-socket time stamp) and
+ * SO_TIMESTAMP[NS].
+ *
+ * Copyright (C) 2009 Intel Corporation.
+ * Author: Patrick Ohly <patrick.ohly@...el.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/select.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+
+#include <asm/types.h>
+#include <linux/net_tstamp.h>
+#include <linux/errqueue.h>
+
+#ifndef SO_TIMESTAMPING
+# define SO_TIMESTAMPING         37
+# define SCM_TIMESTAMPING        SO_TIMESTAMPING
+#endif
+
+#ifndef SO_TIMESTAMPNS
+# define SO_TIMESTAMPNS 35
+#endif
+
+#ifndef SIOCGSTAMPNS
+# define SIOCGSTAMPNS 0x8907
+#endif
+
+#ifndef SIOCSHWTSTAMP
+# define SIOCSHWTSTAMP 0x89b0
+#endif
+
+static void usage(const char *error)
+{
+	if (error)
+		printf("invalid option: %s\n", error);
+	printf("timestamping interface option*\n\n"
+	       "Options:\n"
+	       "  IP_MULTICAST_LOOP - looping outgoing multicasts\n"
+	       "  SO_TIMESTAMP - normal software time stamping, ms resolution\n"
+	       "  SO_TIMESTAMPNS - more accurate software time stamping\n"
+	       "  SOF_TIMESTAMPING_TX_HARDWARE - hardware time stamping of outgoing packets\n"
+	       "  SOF_TIMESTAMPING_TX_SOFTWARE - software fallback for outgoing packets\n"
+	       "  SOF_TIMESTAMPING_RX_HARDWARE - hardware time stamping of incoming packets\n"
+	       "  SOF_TIMESTAMPING_RX_SOFTWARE - software fallback for incoming packets\n"
+	       "  SOF_TIMESTAMPING_SOFTWARE - request reporting of software time stamps\n"
+	       "  SOF_TIMESTAMPING_RAW_HARDWARE - request reporting of raw HW time stamps\n"
+	       "  SIOCGSTAMP - check last socket time stamp\n"
+	       "  SIOCGSTAMPNS - more accurate socket time stamp\n");
+	exit(1);
+}
+
+static void bail(const char *error)
+{
+	printf("%s: %s\n", error, strerror(errno));
+	exit(1);
+}
+
+static const unsigned char sync[] = {
+	0x00, 0x01, 0x00, 0x01,
+	0x5f, 0x44, 0x46, 0x4c,
+	0x54, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x01, 0x01,
+
+	/* fake uuid */
+	0x00, 0x01,
+	0x02, 0x03, 0x04, 0x05,
+
+	0x00, 0x01, 0x00, 0x37,
+	0x00, 0x00, 0x00, 0x08,
+	0x00, 0x00, 0x00, 0x00,
+	0x49, 0x05, 0xcd, 0x01,
+	0x29, 0xb1, 0x8d, 0xb0,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x01,
+
+	/* fake uuid */
+	0x00, 0x01,
+	0x02, 0x03, 0x04, 0x05,
+
+	0x00, 0x00, 0x00, 0x37,
+	0x00, 0x00, 0x00, 0x04,
+	0x44, 0x46, 0x4c, 0x54,
+	0x00, 0x00, 0xf0, 0x60,
+	0x00, 0x01, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x01,
+	0x00, 0x00, 0xf0, 0x60,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x04,
+	0x44, 0x46, 0x4c, 0x54,
+	0x00, 0x01,
+
+	/* fake uuid */
+	0x00, 0x01,
+	0x02, 0x03, 0x04, 0x05,
+
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00
+};
+
+static void sendpacket(int sock, struct sockaddr *addr, socklen_t addr_len)
+{
+	struct timeval now;
+	int res;
+
+	res = sendto(sock, sync, sizeof(sync), 0,
+		addr, addr_len);
+	gettimeofday(&now, 0);
+	if (res < 0)
+		printf("%s: %s\n", "send", strerror(errno));
+	else
+		printf("%ld.%06ld: sent %d bytes\n",
+		       (long)now.tv_sec, (long)now.tv_usec,
+		       res);
+}
+
+static void printpacket(struct msghdr *msg, int res,
+			char *data,
+			int sock, int recvmsg_flags,
+			int siocgstamp, int siocgstampns)
+{
+	struct sockaddr_in *from_addr = (struct sockaddr_in *)msg->msg_name;
+	struct cmsghdr *cmsg;
+	struct timeval tv;
+	struct timespec ts;
+	struct timeval now;
+
+	gettimeofday(&now, 0);
+
+	printf("%ld.%06ld: received %s data, %d bytes from %s, %zu bytes control messages\n",
+	       (long)now.tv_sec, (long)now.tv_usec,
+	       (recvmsg_flags & MSG_ERRQUEUE) ? "error" : "regular",
+	       res,
+	       inet_ntoa(from_addr->sin_addr),
+	       msg->msg_controllen);
+	for (cmsg = CMSG_FIRSTHDR(msg);
+	     cmsg;
+	     cmsg = CMSG_NXTHDR(msg, cmsg)) {
+		printf("   cmsg len %zu: ", cmsg->cmsg_len);
+		switch (cmsg->cmsg_level) {
+		case SOL_SOCKET:
+			printf("SOL_SOCKET ");
+			switch (cmsg->cmsg_type) {
+			case SO_TIMESTAMP: {
+				struct timeval *stamp =
+					(struct timeval *)CMSG_DATA(cmsg);
+				printf("SO_TIMESTAMP %ld.%06ld",
+				       (long)stamp->tv_sec,
+				       (long)stamp->tv_usec);
+				break;
+			}
+			case SO_TIMESTAMPNS: {
+				struct timespec *stamp =
+					(struct timespec *)CMSG_DATA(cmsg);
+				printf("SO_TIMESTAMPNS %ld.%09ld",
+				       (long)stamp->tv_sec,
+				       (long)stamp->tv_nsec);
+				break;
+			}
+			case SO_TIMESTAMPING: {
+				struct timespec *stamp =
+					(struct timespec *)CMSG_DATA(cmsg);
+				printf("SO_TIMESTAMPING ");
+				printf("SW %ld.%09ld ",
+				       (long)stamp->tv_sec,
+				       (long)stamp->tv_nsec);
+				stamp++;
+				/* skip deprecated HW transformed */
+				stamp++;
+				printf("HW raw %ld.%09ld",
+				       (long)stamp->tv_sec,
+				       (long)stamp->tv_nsec);
+				break;
+			}
+			default:
+				printf("type %d", cmsg->cmsg_type);
+				break;
+			}
+			break;
+		case IPPROTO_IP:
+			printf("IPPROTO_IP ");
+			switch (cmsg->cmsg_type) {
+			case IP_RECVERR: {
+				struct sock_extended_err *err =
+					(struct sock_extended_err *)CMSG_DATA(cmsg);
+				printf("IP_RECVERR ee_errno '%s' ee_origin %d => %s",
+					strerror(err->ee_errno),
+					err->ee_origin,
+#ifdef SO_EE_ORIGIN_TIMESTAMPING
+					err->ee_origin == SO_EE_ORIGIN_TIMESTAMPING ?
+					"bounced packet" : "unexpected origin"
+#else
+					"probably SO_EE_ORIGIN_TIMESTAMPING"
+#endif
+					);
+				if (res < sizeof(sync))
+					printf(" => truncated data?!");
+				else if (!memcmp(sync, data + res - sizeof(sync),
+							sizeof(sync)))
+					printf(" => GOT OUR DATA BACK (HURRAY!)");
+				break;
+			}
+			case IP_PKTINFO: {
+				struct in_pktinfo *pktinfo =
+					(struct in_pktinfo *)CMSG_DATA(cmsg);
+				printf("IP_PKTINFO interface index %u",
+					pktinfo->ipi_ifindex);
+				break;
+			}
+			default:
+				printf("type %d", cmsg->cmsg_type);
+				break;
+			}
+			break;
+		default:
+			printf("level %d type %d",
+				cmsg->cmsg_level,
+				cmsg->cmsg_type);
+			break;
+		}
+		printf("\n");
+	}
+
+	if (siocgstamp) {
+		if (ioctl(sock, SIOCGSTAMP, &tv))
+			printf("   %s: %s\n", "SIOCGSTAMP", strerror(errno));
+		else
+			printf("SIOCGSTAMP %ld.%06ld\n",
+			       (long)tv.tv_sec,
+			       (long)tv.tv_usec);
+	}
+	if (siocgstampns) {
+		if (ioctl(sock, SIOCGSTAMPNS, &ts))
+			printf("   %s: %s\n", "SIOCGSTAMPNS", strerror(errno));
+		else
+			printf("SIOCGSTAMPNS %ld.%09ld\n",
+			       (long)ts.tv_sec,
+			       (long)ts.tv_nsec);
+	}
+}
+
+static void recvpacket(int sock, int recvmsg_flags,
+		       int siocgstamp, int siocgstampns)
+{
+	char data[256];
+	struct msghdr msg;
+	struct iovec entry;
+	struct sockaddr_in from_addr;
+	struct {
+		struct cmsghdr cm;
+		char control[512];
+	} control;
+	int res;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.msg_iov = &entry;
+	msg.msg_iovlen = 1;
+	entry.iov_base = data;
+	entry.iov_len = sizeof(data);
+	msg.msg_name = (caddr_t)&from_addr;
+	msg.msg_namelen = sizeof(from_addr);
+	msg.msg_control = &control;
+	msg.msg_controllen = sizeof(control);
+
+	res = recvmsg(sock, &msg, recvmsg_flags|MSG_DONTWAIT);
+	if (res < 0) {
+		printf("%s %s: %s\n",
+		       "recvmsg",
+		       (recvmsg_flags & MSG_ERRQUEUE) ? "error" : "regular",
+		       strerror(errno));
+	} else {
+		printpacket(&msg, res, data,
+			    sock, recvmsg_flags,
+			    siocgstamp, siocgstampns);
+	}
+}
+
+int main(int argc, char **argv)
+{
+	int so_timestamping_flags = 0;
+	int so_timestamp = 0;
+	int so_timestampns = 0;
+	int siocgstamp = 0;
+	int siocgstampns = 0;
+	int ip_multicast_loop = 0;
+	char *interface;
+	int i;
+	int enabled = 1;
+	int sock;
+	struct ifreq device;
+	struct ifreq hwtstamp;
+	struct hwtstamp_config hwconfig, hwconfig_requested;
+	struct sockaddr_in addr;
+	struct ip_mreq imr;
+	struct in_addr iaddr;
+	int val;
+	socklen_t len;
+	struct timeval next;
+
+	if (argc < 2)
+		usage(0);
+	interface = argv[1];
+
+	for (i = 2; i < argc; i++) {
+		if (!strcasecmp(argv[i], "SO_TIMESTAMP"))
+			so_timestamp = 1;
+		else if (!strcasecmp(argv[i], "SO_TIMESTAMPNS"))
+			so_timestampns = 1;
+		else if (!strcasecmp(argv[i], "SIOCGSTAMP"))
+			siocgstamp = 1;
+		else if (!strcasecmp(argv[i], "SIOCGSTAMPNS"))
+			siocgstampns = 1;
+		else if (!strcasecmp(argv[i], "IP_MULTICAST_LOOP"))
+			ip_multicast_loop = 1;
+		else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_TX_HARDWARE"))
+			so_timestamping_flags |= SOF_TIMESTAMPING_TX_HARDWARE;
+		else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_TX_SOFTWARE"))
+			so_timestamping_flags |= SOF_TIMESTAMPING_TX_SOFTWARE;
+		else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_RX_HARDWARE"))
+			so_timestamping_flags |= SOF_TIMESTAMPING_RX_HARDWARE;
+		else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_RX_SOFTWARE"))
+			so_timestamping_flags |= SOF_TIMESTAMPING_RX_SOFTWARE;
+		else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_SOFTWARE"))
+			so_timestamping_flags |= SOF_TIMESTAMPING_SOFTWARE;
+		else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_RAW_HARDWARE"))
+			so_timestamping_flags |= SOF_TIMESTAMPING_RAW_HARDWARE;
+		else
+			usage(argv[i]);
+	}
+
+	sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
+	if (sock < 0)
+		bail("socket");
+
+	memset(&device, 0, sizeof(device));
+	strncpy(device.ifr_name, interface, sizeof(device.ifr_name));
+	if (ioctl(sock, SIOCGIFADDR, &device) < 0)
+		bail("getting interface IP address");
+
+	memset(&hwtstamp, 0, sizeof(hwtstamp));
+	strncpy(hwtstamp.ifr_name, interface, sizeof(hwtstamp.ifr_name));
+	hwtstamp.ifr_data = (void *)&hwconfig;
+	memset(&hwconfig, 0, sizeof(hwconfig));
+	hwconfig.tx_type =
+		(so_timestamping_flags & SOF_TIMESTAMPING_TX_HARDWARE) ?
+		HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
+	hwconfig.rx_filter =
+		(so_timestamping_flags & SOF_TIMESTAMPING_RX_HARDWARE) ?
+		HWTSTAMP_FILTER_PTP_V1_L4_SYNC : HWTSTAMP_FILTER_NONE;
+	hwconfig_requested = hwconfig;
+	if (ioctl(sock, SIOCSHWTSTAMP, &hwtstamp) < 0) {
+		if ((errno == EINVAL || errno == ENOTSUP) &&
+		    hwconfig_requested.tx_type == HWTSTAMP_TX_OFF &&
+		    hwconfig_requested.rx_filter == HWTSTAMP_FILTER_NONE)
+			printf("SIOCSHWTSTAMP: disabling hardware time stamping not possible\n");
+		else
+			bail("SIOCSHWTSTAMP");
+	}
+	printf("SIOCSHWTSTAMP: tx_type %d requested, got %d; rx_filter %d requested, got %d\n",
+	       hwconfig_requested.tx_type, hwconfig.tx_type,
+	       hwconfig_requested.rx_filter, hwconfig.rx_filter);
+
+	/* bind to PTP port */
+	addr.sin_family = AF_INET;
+	addr.sin_addr.s_addr = htonl(INADDR_ANY);
+	addr.sin_port = htons(319 /* PTP event port */);
+	if (bind(sock,
+		 (struct sockaddr *)&addr,
+		 sizeof(struct sockaddr_in)) < 0)
+		bail("bind");
+
+	/* set multicast group for outgoing packets */
+	inet_aton("224.0.1.130", &iaddr); /* alternate PTP domain 1 */
+	addr.sin_addr = iaddr;
+	imr.imr_multiaddr.s_addr = iaddr.s_addr;
+	imr.imr_interface.s_addr =
+		((struct sockaddr_in *)&device.ifr_addr)->sin_addr.s_addr;
+	if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_IF,
+		       &imr.imr_interface.s_addr, sizeof(struct in_addr)) < 0)
+		bail("set multicast");
+
+	/* join multicast group, loop our own packet */
+	if (setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP,
+		       &imr, sizeof(struct ip_mreq)) < 0)
+		bail("join multicast group");
+
+	if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_LOOP,
+		       &ip_multicast_loop, sizeof(enabled)) < 0) {
+		bail("loop multicast");
+	}
+
+	/* set socket options for time stamping */
+	if (so_timestamp &&
+		setsockopt(sock, SOL_SOCKET, SO_TIMESTAMP,
+			   &enabled, sizeof(enabled)) < 0)
+		bail("setsockopt SO_TIMESTAMP");
+
+	if (so_timestampns &&
+		setsockopt(sock, SOL_SOCKET, SO_TIMESTAMPNS,
+			   &enabled, sizeof(enabled)) < 0)
+		bail("setsockopt SO_TIMESTAMPNS");
+
+	if (so_timestamping_flags &&
+		setsockopt(sock, SOL_SOCKET, SO_TIMESTAMPING,
+			   &so_timestamping_flags,
+			   sizeof(so_timestamping_flags)) < 0)
+		bail("setsockopt SO_TIMESTAMPING");
+
+	/* request IP_PKTINFO for debugging purposes */
+	if (setsockopt(sock, SOL_IP, IP_PKTINFO,
+		       &enabled, sizeof(enabled)) < 0)
+		printf("%s: %s\n", "setsockopt IP_PKTINFO", strerror(errno));
+
+	/* verify socket options */
+	len = sizeof(val);
+	if (getsockopt(sock, SOL_SOCKET, SO_TIMESTAMP, &val, &len) < 0)
+		printf("%s: %s\n", "getsockopt SO_TIMESTAMP", strerror(errno));
+	else
+		printf("SO_TIMESTAMP %d\n", val);
+
+	if (getsockopt(sock, SOL_SOCKET, SO_TIMESTAMPNS, &val, &len) < 0)
+		printf("%s: %s\n", "getsockopt SO_TIMESTAMPNS",
+		       strerror(errno));
+	else
+		printf("SO_TIMESTAMPNS %d\n", val);
+
+	if (getsockopt(sock, SOL_SOCKET, SO_TIMESTAMPING, &val, &len) < 0) {
+		printf("%s: %s\n", "getsockopt SO_TIMESTAMPING",
+		       strerror(errno));
+	} else {
+		printf("SO_TIMESTAMPING %d\n", val);
+		if (val != so_timestamping_flags)
+			printf("   not the expected value %d\n",
+			       so_timestamping_flags);
+	}
+
+	/* send packets forever every five seconds */
+	gettimeofday(&next, 0);
+	next.tv_sec = (next.tv_sec + 1) / 5 * 5;
+	next.tv_usec = 0;
+	while (1) {
+		struct timeval now;
+		struct timeval delta;
+		long delta_us;
+		int res;
+		fd_set readfs, errorfs;
+
+		gettimeofday(&now, 0);
+		delta_us = (long)(next.tv_sec - now.tv_sec) * 1000000 +
+			(long)(next.tv_usec - now.tv_usec);
+		if (delta_us > 0) {
+			/* continue waiting for timeout or data */
+			delta.tv_sec = delta_us / 1000000;
+			delta.tv_usec = delta_us % 1000000;
+
+			FD_ZERO(&readfs);
+			FD_ZERO(&errorfs);
+			FD_SET(sock, &readfs);
+			FD_SET(sock, &errorfs);
+			printf("%ld.%06ld: select %ldus\n",
+			       (long)now.tv_sec, (long)now.tv_usec,
+			       delta_us);
+			res = select(sock + 1, &readfs, 0, &errorfs, &delta);
+			gettimeofday(&now, 0);
+			printf("%ld.%06ld: select returned: %d, %s\n",
+			       (long)now.tv_sec, (long)now.tv_usec,
+			       res,
+			       res < 0 ? strerror(errno) : "success");
+			if (res > 0) {
+				if (FD_ISSET(sock, &readfs))
+					printf("ready for reading\n");
+				if (FD_ISSET(sock, &errorfs))
+					printf("has error\n");
+				recvpacket(sock, 0,
+					   siocgstamp,
+					   siocgstampns);
+				recvpacket(sock, MSG_ERRQUEUE,
+					   siocgstamp,
+					   siocgstampns);
+			}
+		} else {
+			/* write one packet */
+			sendpacket(sock,
+				   (struct sockaddr *)&addr,
+				   sizeof(addr));
+			next.tv_sec += 5;
+			continue;
+		}
+	}
+
+	return 0;
+}
diff --git a/tools/testing/selftests/networking/timestamping/txtimestamp.c b/tools/testing/selftests/networking/timestamping/txtimestamp.c
new file mode 100644
index 000000000000..b32fc2a07734
--- /dev/null
+++ b/tools/testing/selftests/networking/timestamping/txtimestamp.c
@@ -0,0 +1,469 @@
+/*
+ * Copyright 2014 Google Inc.
+ * Author: willemb@...gle.com (Willem de Bruijn)
+ *
+ * Test software tx timestamping, including
+ *
+ * - SCHED, SND and ACK timestamps
+ * - RAW, UDP and TCP
+ * - IPv4 and IPv6
+ * - various packet sizes (to test GSO and TSO)
+ *
+ * Consult the command line arguments for help on running
+ * the various testcases.
+ *
+ * This test requires a dummy TCP server.
+ * A simple `nc6 [-u] -l -p $DESTPORT` will do
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <arpa/inet.h>
+#include <asm/types.h>
+#include <error.h>
+#include <errno.h>
+#include <linux/errqueue.h>
+#include <linux/if_ether.h>
+#include <linux/net_tstamp.h>
+#include <netdb.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <netinet/udp.h>
+#include <netinet/tcp.h>
+#include <netpacket/packet.h>
+#include <poll.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/select.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+/* command line parameters */
+static int cfg_proto = SOCK_STREAM;
+static int cfg_ipproto = IPPROTO_TCP;
+static int cfg_num_pkts = 4;
+static int do_ipv4 = 1;
+static int do_ipv6 = 1;
+static int cfg_payload_len = 10;
+static uint16_t dest_port = 9000;
+
+static struct sockaddr_in daddr;
+static struct sockaddr_in6 daddr6;
+static struct timespec ts_prev;
+
+static void __print_timestamp(const char *name, struct timespec *cur,
+			      uint32_t key, int payload_len)
+{
+	if (!(cur->tv_sec | cur->tv_nsec))
+		return;
+
+	fprintf(stderr, "  %s: %lu s %lu us (seq=%u, len=%u)",
+			name, cur->tv_sec, cur->tv_nsec / 1000,
+			key, payload_len);
+
+	if ((ts_prev.tv_sec | ts_prev.tv_nsec)) {
+		int64_t cur_ms, prev_ms;
+
+		cur_ms = (long) cur->tv_sec * 1000 * 1000;
+		cur_ms += cur->tv_nsec / 1000;
+
+		prev_ms = (long) ts_prev.tv_sec * 1000 * 1000;
+		prev_ms += ts_prev.tv_nsec / 1000;
+
+		fprintf(stderr, "  (%+ld us)", cur_ms - prev_ms);
+	}
+
+	ts_prev = *cur;
+	fprintf(stderr, "\n");
+}
+
+static void print_timestamp_usr(void)
+{
+	struct timespec ts;
+	struct timeval tv;	/* avoid dependency on -lrt */
+
+	gettimeofday(&tv, NULL);
+	ts.tv_sec = tv.tv_sec;
+	ts.tv_nsec = tv.tv_usec * 1000;
+
+	__print_timestamp("  USR", &ts, 0, 0);
+}
+
+static void print_timestamp(struct scm_timestamping *tss, int tstype,
+			    int tskey, int payload_len)
+{
+	const char *tsname;
+
+	switch (tstype) {
+	case SCM_TSTAMP_SCHED:
+		tsname = "  ENQ";
+		break;
+	case SCM_TSTAMP_SND:
+		tsname = "  SND";
+		break;
+	case SCM_TSTAMP_ACK:
+		tsname = "  ACK";
+		break;
+	default:
+		error(1, 0, "unknown timestamp type: %u",
+		tstype);
+	}
+	__print_timestamp(tsname, &tss->ts[0], tskey, payload_len);
+}
+
+static void __poll(int fd)
+{
+	struct pollfd pollfd;
+	int ret;
+
+	memset(&pollfd, 0, sizeof(pollfd));
+	pollfd.fd = fd;
+	ret = poll(&pollfd, 1, 100);
+	if (ret != 1)
+		error(1, errno, "poll");
+}
+
+static void __recv_errmsg_cmsg(struct msghdr *msg, int payload_len)
+{
+	struct sock_extended_err *serr = NULL;
+	struct scm_timestamping *tss = NULL;
+	struct cmsghdr *cm;
+
+	for (cm = CMSG_FIRSTHDR(msg);
+	     cm && cm->cmsg_len;
+	     cm = CMSG_NXTHDR(msg, cm)) {
+		if (cm->cmsg_level == SOL_SOCKET &&
+		    cm->cmsg_type == SCM_TIMESTAMPING) {
+			tss = (void *) CMSG_DATA(cm);
+		} else if ((cm->cmsg_level == SOL_IP &&
+		     cm->cmsg_type == IP_RECVERR) ||
+		    (cm->cmsg_level == SOL_IPV6 &&
+		     cm->cmsg_type == IPV6_RECVERR)) {
+
+			serr = (void *) CMSG_DATA(cm);
+			if (serr->ee_errno != ENOMSG ||
+			    serr->ee_origin != SO_EE_ORIGIN_TIMESTAMPING) {
+				fprintf(stderr, "unknown ip error %d %d\n",
+						serr->ee_errno,
+						serr->ee_origin);
+				serr = NULL;
+			}
+		} else
+			fprintf(stderr, "unknown cmsg %d,%d\n",
+					cm->cmsg_level, cm->cmsg_type);
+	}
+
+	if (serr && tss)
+		print_timestamp(tss, serr->ee_info, serr->ee_data, payload_len);
+}
+
+static int recv_errmsg(int fd)
+{
+	static char ctrl[1024 /* overprovision*/];
+	static struct msghdr msg;
+	struct iovec entry;
+	static char *data;
+	int ret = 0;
+
+	data = malloc(cfg_payload_len);
+	if (!data)
+		error(1, 0, "malloc");
+
+	memset(&msg, 0, sizeof(msg));
+	memset(&entry, 0, sizeof(entry));
+	memset(ctrl, 0, sizeof(ctrl));
+
+	entry.iov_base = data;
+	entry.iov_len = cfg_payload_len;
+	msg.msg_iov = &entry;
+	msg.msg_iovlen = 1;
+	msg.msg_name = NULL;
+	msg.msg_namelen = 0;
+	msg.msg_control = ctrl;
+	msg.msg_controllen = sizeof(ctrl);
+
+	ret = recvmsg(fd, &msg, MSG_ERRQUEUE);
+	if (ret == -1 && errno != EAGAIN)
+		error(1, errno, "recvmsg");
+
+	__recv_errmsg_cmsg(&msg, ret);
+
+	free(data);
+	return ret == -1;
+}
+
+static void do_test(int family, unsigned int opt)
+{
+	char *buf;
+	int fd, i, val, total_len;
+
+	if (family == IPPROTO_IPV6 && cfg_proto != SOCK_STREAM) {
+		/* due to lack of checksum generation code */
+		fprintf(stderr, "test: skipping datagram over IPv6\n");
+		return;
+	}
+
+	total_len = cfg_payload_len;
+	if (cfg_proto == SOCK_RAW) {
+		total_len += sizeof(struct udphdr);
+		if (cfg_ipproto == IPPROTO_RAW)
+			total_len += sizeof(struct iphdr);
+	}
+
+	buf = malloc(total_len);
+	if (!buf)
+		error(1, 0, "malloc");
+
+	fd = socket(family, cfg_proto, cfg_ipproto);
+	if (fd < 0)
+		error(1, errno, "socket");
+
+	if (cfg_proto == SOCK_STREAM) {
+		val = 1;
+		if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY,
+			       (char*) &val, sizeof(val)))
+			error(1, 0, "setsockopt no nagle");
+
+		if (family == PF_INET) {
+			if (connect(fd, (void *) &daddr, sizeof(daddr)))
+				error(1, errno, "connect ipv4");
+		} else {
+			if (connect(fd, (void *) &daddr6, sizeof(daddr6)))
+				error(1, errno, "connect ipv6");
+		}
+	}
+
+	opt |= SOF_TIMESTAMPING_SOFTWARE |
+	       SOF_TIMESTAMPING_OPT_ID;
+	if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING,
+		       (char *) &opt, sizeof(opt)))
+		error(1, 0, "setsockopt timestamping");
+
+	for (i = 0; i < cfg_num_pkts; i++) {
+		memset(&ts_prev, 0, sizeof(ts_prev));
+		memset(buf, 'a' + i, total_len);
+		buf[total_len - 2] = '\n';
+		buf[total_len - 1] = '\0';
+
+		if (cfg_proto == SOCK_RAW) {
+			struct udphdr *udph;
+			int off = 0;
+
+			if (cfg_ipproto == IPPROTO_RAW) {
+				struct iphdr *iph = (void *) buf;
+
+				memset(iph, 0, sizeof(*iph));
+				iph->ihl      = 5;
+				iph->version  = 4;
+				iph->ttl      = 2;
+				iph->daddr    = daddr.sin_addr.s_addr;
+				iph->protocol = IPPROTO_UDP;
+				/* kernel writes saddr, csum, len */
+
+				off = sizeof(*iph);
+			}
+
+			udph = (void *) buf + off;
+			udph->source = ntohs(9000); 	/* random spoof */
+			udph->dest   = ntohs(dest_port);
+			udph->len    = ntohs(sizeof(*udph) + cfg_payload_len);
+			udph->check  = 0;	/* not allowed for IPv6 */
+		}
+
+		print_timestamp_usr();
+		if (cfg_proto != SOCK_STREAM) {
+			if (family == PF_INET)
+				val = sendto(fd, buf, total_len, 0, (void *) &daddr, sizeof(daddr));
+			else
+				val = sendto(fd, buf, total_len, 0, (void *) &daddr6, sizeof(daddr6));
+		} else {
+			val = send(fd, buf, cfg_payload_len, 0);
+		}
+		if (val != total_len)
+			error(1, errno, "send");
+
+		/* wait for all errors to be queued, else ACKs arrive OOO */
+		usleep(50 * 1000);
+
+		__poll(fd);
+
+		while (!recv_errmsg(fd)) {}
+	}
+
+	if (close(fd))
+		error(1, errno, "close");
+
+	free(buf);
+	usleep(400 * 1000);
+}
+
+static void __attribute__((noreturn)) usage(const char *filepath)
+{
+	fprintf(stderr, "\nUsage: %s [options] hostname\n"
+			"\nwhere options are:\n"
+			"  -4:   only IPv4\n"
+			"  -6:   only IPv6\n"
+			"  -h:   show this message\n"
+			"  -l N: send N bytes at a time\n"
+			"  -r:   use raw\n"
+			"  -R:   use raw (IP_HDRINCL)\n"
+			"  -p N: connect to port N\n"
+			"  -u:   use udp\n",
+			filepath);
+	exit(1);
+}
+
+static void parse_opt(int argc, char **argv)
+{
+	int proto_count = 0;
+	char c;
+
+	while ((c = getopt(argc, argv, "46hl:p:rRu")) != -1) {
+		switch (c) {
+		case '4':
+			do_ipv6 = 0;
+			break;
+		case '6':
+			do_ipv4 = 0;
+			break;
+		case 'r':
+			proto_count++;
+			cfg_proto = SOCK_RAW;
+			cfg_ipproto = IPPROTO_UDP;
+			break;
+		case 'R':
+			proto_count++;
+			cfg_proto = SOCK_RAW;
+			cfg_ipproto = IPPROTO_RAW;
+			break;
+		case 'u':
+			proto_count++;
+			cfg_proto = SOCK_DGRAM;
+			cfg_ipproto = IPPROTO_UDP;
+			break;
+		case 'l':
+			cfg_payload_len = strtoul(optarg, NULL, 10);
+			break;
+		case 'p':
+			dest_port = strtoul(optarg, NULL, 10);
+			break;
+		case 'h':
+		default:
+			usage(argv[0]);
+		}
+	}
+
+	if (!cfg_payload_len)
+		error(1, 0, "payload may not be nonzero");
+	if (cfg_proto != SOCK_STREAM && cfg_payload_len > 1472)
+		error(1, 0, "udp packet might exceed expected MTU");
+	if (!do_ipv4 && !do_ipv6)
+		error(1, 0, "pass -4 or -6, not both");
+	if (proto_count > 1)
+		error(1, 0, "pass -r, -R or -u, not multiple");
+
+	if (optind != argc - 1)
+		error(1, 0, "missing required hostname argument");
+}
+
+static void resolve_hostname(const char *hostname)
+{
+	struct addrinfo *addrs, *cur;
+	int have_ipv4 = 0, have_ipv6 = 0;
+
+	if (getaddrinfo(hostname, NULL, NULL, &addrs))
+		error(1, errno, "getaddrinfo");
+
+	cur = addrs;
+	while (cur && !have_ipv4 && !have_ipv6) {
+		if (!have_ipv4 && cur->ai_family == AF_INET) {
+			memcpy(&daddr, cur->ai_addr, sizeof(daddr));
+			daddr.sin_port = htons(dest_port);
+			have_ipv4 = 1;
+		}
+		else if (!have_ipv6 && cur->ai_family == AF_INET6) {
+			memcpy(&daddr6, cur->ai_addr, sizeof(daddr6));
+			daddr6.sin6_port = htons(dest_port);
+			have_ipv6 = 1;
+		}
+		cur = cur->ai_next;
+	}
+	if (addrs)
+		freeaddrinfo(addrs);
+
+	do_ipv4 &= have_ipv4;
+	do_ipv6 &= have_ipv6;
+}
+
+static void do_main(int family)
+{
+	fprintf(stderr, "family:       %s\n",
+			family == PF_INET ? "INET" : "INET6");
+
+	fprintf(stderr, "test SND\n");
+	do_test(family, SOF_TIMESTAMPING_TX_SOFTWARE);
+
+	fprintf(stderr, "test ENQ\n");
+	do_test(family, SOF_TIMESTAMPING_TX_SCHED);
+
+	fprintf(stderr, "test ENQ + SND\n");
+	do_test(family, SOF_TIMESTAMPING_TX_SCHED |
+			SOF_TIMESTAMPING_TX_SOFTWARE);
+
+	if (cfg_proto == SOCK_STREAM) {
+		fprintf(stderr, "\ntest ACK\n");
+		do_test(family, SOF_TIMESTAMPING_TX_ACK);
+
+		fprintf(stderr, "\ntest SND + ACK\n");
+		do_test(family, SOF_TIMESTAMPING_TX_SOFTWARE |
+				SOF_TIMESTAMPING_TX_ACK);
+
+		fprintf(stderr, "\ntest ENQ + SND + ACK\n");
+		do_test(family, SOF_TIMESTAMPING_TX_SCHED |
+				SOF_TIMESTAMPING_TX_SOFTWARE |
+				SOF_TIMESTAMPING_TX_ACK);
+	}
+}
+
+const char *sock_names[] = { NULL, "TCP", "UDP", "RAW" };
+
+int main(int argc, char **argv)
+{
+	if (argc == 1)
+		usage(argv[0]);
+
+	parse_opt(argc, argv);
+	resolve_hostname(argv[argc - 1]);
+
+	fprintf(stderr, "protocol:     %s\n", sock_names[cfg_proto]);
+	fprintf(stderr, "payload:      %u\n", cfg_payload_len);
+	fprintf(stderr, "server port:  %u\n", dest_port);
+	fprintf(stderr, "\n");
+
+	if (do_ipv4)
+		do_main(PF_INET);
+	if (do_ipv6)
+		do_main(PF_INET6);
+
+	return 0;
+}

Powered by blists - more mailing lists