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Message-ID: <20070919170222.GA10161@c2.user-mode-linux.org>
Date: Wed, 19 Sep 2007 13:02:22 -0400
From: Jeff Dike <jdike@...toit.com>
To: Andrew Morton <akpm@...l.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: [PATCH 1/11] UML - Eliminate hz()
Eliminate hz() since its only purpose was to provide a kernel-space
constant to userspace code. This can be done instead by providing the
constant directly through kernel_constants.h.
Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
---
arch/um/include/common-offsets.h | 2 ++
arch/um/include/kern_util.h | 1 -
arch/um/kernel/time.c | 5 -----
arch/um/os-Linux/skas/process.c | 5 +++--
arch/um/os-Linux/time.c | 7 +++----
5 files changed, 8 insertions(+), 12 deletions(-)
Index: linux-2.6.20/arch/um/include/common-offsets.h
===================================================================
--- linux-2.6.20.orig/arch/um/include/common-offsets.h 2007-09-19 12:24:52.000000000 -0400
+++ linux-2.6.20/arch/um/include/common-offsets.h 2007-09-19 12:25:05.000000000 -0400
@@ -32,3 +32,5 @@ DEFINE(UM_GFP_ATOMIC, GFP_ATOMIC);
DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
DEFINE(UM_THREAD_SIZE, THREAD_SIZE);
+
+DEFINE(UM_HZ, HZ);
Index: linux-2.6.20/arch/um/include/kern_util.h
===================================================================
--- linux-2.6.20.orig/arch/um/include/kern_util.h 2007-09-19 12:24:52.000000000 -0400
+++ linux-2.6.20/arch/um/include/kern_util.h 2007-09-19 12:25:05.000000000 -0400
@@ -64,7 +64,6 @@ extern void paging_init(void);
extern void init_flush_vm(void);
extern void *syscall_sp(void *t);
extern void syscall_trace(struct uml_pt_regs *regs, int entryexit);
-extern int hz(void);
extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs);
extern void interrupt_end(void);
extern void initial_thread_cb(void (*proc)(void *), void *arg);
Index: linux-2.6.20/arch/um/kernel/time.c
===================================================================
--- linux-2.6.20.orig/arch/um/kernel/time.c 2007-09-19 12:24:52.000000000 -0400
+++ linux-2.6.20/arch/um/kernel/time.c 2007-09-19 12:25:05.000000000 -0400
@@ -11,11 +11,6 @@
#include "kern_util.h"
#include "os.h"
-int hz(void)
-{
- return HZ;
-}
-
/*
* Scheduler clock - returns current time in nanosec units.
*/
Index: linux-2.6.20/arch/um/os-Linux/skas/process.c
===================================================================
--- linux-2.6.20.orig/arch/um/os-Linux/skas/process.c 2007-09-19 12:24:52.000000000 -0400
+++ linux-2.6.20/arch/um/os-Linux/skas/process.c 2007-09-19 12:25:05.000000000 -0400
@@ -392,8 +392,9 @@ int copy_context_skas0(unsigned long new
*data = ((struct stub_data) { .offset = MMAP_OFFSET(new_offset),
.fd = new_fd,
.timer = ((struct itimerval)
- { { 0, 1000000 / hz() },
- { 0, 1000000 / hz() }})});
+ { { 0, 1000000 / UM_HZ },
+ { 0, 1000000 / UM_HZ }})
+ });
err = ptrace_setregs(pid, thread_regs);
if (err < 0)
panic("copy_context_skas0 : PTRACE_SETREGS failed, "
Index: linux-2.6.20/arch/um/os-Linux/time.c
===================================================================
--- linux-2.6.20.orig/arch/um/os-Linux/time.c 2007-09-19 12:24:52.000000000 -0400
+++ linux-2.6.20/arch/um/os-Linux/time.c 2007-09-19 12:25:05.000000000 -0400
@@ -8,14 +8,13 @@
#include <signal.h>
#include <time.h>
#include <sys/time.h>
-#include "kern_util.h"
#include "kern_constants.h"
#include "os.h"
#include "user.h"
int set_interval(int is_virtual)
{
- int usec = 1000000/hz();
+ int usec = 1000000/UM_HZ;
int timer_type = is_virtual ? ITIMER_VIRTUAL : ITIMER_REAL;
struct itimerval interval = ((struct itimerval) { { 0, usec },
{ 0, usec } });
@@ -43,8 +42,8 @@ void disable_timer(void)
void switch_timers(int to_real)
{
struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }});
- struct itimerval enable = ((struct itimerval) { { 0, 1000000/hz() },
- { 0, 1000000/hz() }});
+ struct itimerval enable = ((struct itimerval) { { 0, 1000000/UM_HZ },
+ { 0, 1000000/UM_HZ }});
int old, new;
if (to_real) {
-
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