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Date: Thu, 7 Jun 2018 18:14:45 -0700
From: Jayant Chowdhary <jchowdhary@...gle.com>
To: Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
kernel-team@...roid.com,
Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH] uapi: Make generic uapi headers compile standalone.
Hi,
On 06/06/2018 09:58 PM, Masahiro Yamada wrote:
> Hi.
>
>
> 2018-06-07 8:16 GMT+09:00 Jayant Chowdhary <jchowdhary@...gle.com>:
>> In order for static analysis tools to analyze each of the uapi headers,
>> we need to enable them to compile stand-alone. Some uapi headers were
>> missing dependencies which would not make them compile stand-alone in
>> user-land. This patch adds those dependencies.
>>
>> Test: make defconfig; make -j64
>>
>> Test: make ARCH=arm64 defconfig;
>> ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make -j64 all
>>
>> Test: ran header-abi-dumper[1] on all the affected headers with
>> appropriate include paths[2] for arm64. eg: for drm_fourcc.h,
>>
>> $HEADER_ABI_DUMPER -o drm_fourcc.h.sdump \
>> include/uapi/drm/drm_fourcc.h -- -target aarch64-linux-android -std=gnu99 \
>> -isystem $CLANG_INCLUDE_PATH \
>> -I include/uapi/ -I arch/arm64/include/generated/uapi \
>> -I arch/arm64/include/uapi -I private-compiler-headers
>> -I include/generated/uapi \
>> -I include/uapi/../../arch/arm/include/uapi
>
>
> First of all, is this check sensible?
>
> scripts/headers_install.sh manipulates exported headers.
>
> So, shouldn't you do this check after "make headers_install"?
>
>
Apologies, I was unaware of this. Now it is obvious that this check is not
sensible :) The headers which should be checked are the ones 'make headers
install' produces and not the ones being checked currently. I'll fix this in the
next version of this patch.
>
> You are adding around <linux/compiler.h> to various UAPI headers.
> Could you tell me why it was added?
>
> The tool rips off <linux/compiler.h> anyway when exporting UAPI headers:
> https://github.com/torvalds/linux/blob/v4.17/scripts/headers_install.sh#L37
>
>
I had added these to satisfy the defines included from <linux/compiler.h>,
however, since headers_install.sh removes the #includes and the defines
themselves, these additions should not be needed.
>
>
> Also, you are adding <stdint.h> to several headers.
> Please do not pull it in to the kernel space.
> The kernel space defines fixed-width types in its headers.
>
> For example, you added <stdint.h> to include/uapi/scsi/scsi_netlink.h
>
> In my opinion, the correct fix is to replace uint8_t with __u8 or __uint8_t.
>
>
Sure, I will correct this.
Thanks,
Jayant
>
>
>
>
>> where
>> HEADER_ABI_DUMPER=\
>> $ANDROID_BUILD_TOP/prebuilts/clang-tools/linux-x86/bin/header-abi-dumper
>>
>> CLANG_INCLUDE_PATH=\
>> $ANDROID_BUILD_TOP/prebuilts/clang/host/linux-x86/clang-3289846/bin/../lib64/clang/3.8/include
>>
>> on a lunched aosp tree [3]
>>
>> [1]
>> header-abi-dumper is a clang based static analysis tool, used by android's build
>> system which parses a C/C++ source file and emits information about the data
>> types included in the source. More information can be found at
>> https://android.googlesource.com/platform/development/+/master/vndk/tools/header-checker/README.md
>>
>> [2]
>> Some headers, eg: compiler_types.h, compiler.h, sys/socket.h are not in the
>> set of uapi headers, even though they are included by uapi headers(
>> include/uapi/linux/types.h, include/uapi/asm-generic/signal-defs.h etc). The
>> 'private-compiler-headers' in the test clause was included with private copies
>> of these headers. libc distributions (eg: bionic) often have their
>> copies of these headers as well.
>>
>> [3]
>> https://source.android.com/setup/build/downloading
>>
>> Cc: akpm@...ux-foundation.org
>> Cc: kernel-team@...roid.com
>> Cc: linux-kbuild@...r.kernel.org
>> Signed-off-by: Jayant Chowdhary <jchowdhary@...gle.com>
>> ---
>> include/uapi/asm-generic/ipcbuf.h | 2 ++
>> include/uapi/asm-generic/msgbuf.h | 3 +++
>> include/uapi/asm-generic/sembuf.h | 2 ++
>> include/uapi/asm-generic/shmbuf.h | 2 ++
>> include/uapi/asm-generic/ucontext.h | 5 +++++
>> include/uapi/linux/agpgart.h | 1 -
>> include/uapi/linux/android/binder.h | 1 +
>> include/uapi/linux/chio.h | 6 ++++++
>> include/uapi/linux/coda_psdev.h | 1 +
>> include/uapi/linux/dvb/dmx.h | 3 ---
>> include/uapi/linux/dvb/video.h | 3 ---
>> include/uapi/linux/errqueue.h | 1 +
>> include/uapi/linux/kexec.h | 1 +
>> include/uapi/linux/kfd_ioctl.h | 1 +
>> include/uapi/linux/lightnvm.h | 1 -
>> include/uapi/linux/ndctl.h | 1 +
>> include/uapi/linux/netfilter_bridge/ebtables.h | 1 +
>> include/uapi/linux/nfs4_mount.h | 3 +++
>> include/uapi/linux/psp-sev.h | 1 +
>> include/uapi/linux/scc.h | 2 +-
>> include/uapi/linux/sctp.h | 3 +++
>> include/uapi/linux/sdla.h | 2 ++
>> include/uapi/linux/socket.h | 4 ++++
>> include/uapi/linux/stddef.h | 5 +++++
>> include/uapi/linux/sysctl.h | 1 +
>> include/uapi/linux/types.h | 1 +
>> include/uapi/linux/vbox_vmmdev_types.h | 1 +
>> include/uapi/linux/vboxguest.h | 1 +
>> include/uapi/rdma/hfi/hfi1_user.h | 1 +
>> include/uapi/scsi/scsi_bsg_fc.h | 2 ++
>> include/uapi/scsi/scsi_netlink.h | 1 +
>> include/uapi/sound/asound.h | 2 +-
>> 32 files changed, 55 insertions(+), 10 deletions(-)
>>
>> diff --git a/include/uapi/asm-generic/ipcbuf.h b/include/uapi/asm-generic/ipcbuf.h
>> index 7d80dbd336fb..41a01b494fc7 100644
>> --- a/include/uapi/asm-generic/ipcbuf.h
>> +++ b/include/uapi/asm-generic/ipcbuf.h
>> @@ -2,6 +2,8 @@
>> #ifndef __ASM_GENERIC_IPCBUF_H
>> #define __ASM_GENERIC_IPCBUF_H
>>
>> +#include <linux/posix_types.h>
>> +
>> /*
>> * The generic ipc64_perm structure:
>> * Note extra padding because this structure is passed back and forth
>> diff --git a/include/uapi/asm-generic/msgbuf.h b/include/uapi/asm-generic/msgbuf.h
>> index fb306ebdb36f..8cdd7ca75df6 100644
>> --- a/include/uapi/asm-generic/msgbuf.h
>> +++ b/include/uapi/asm-generic/msgbuf.h
>> @@ -3,6 +3,9 @@
>> #define __ASM_GENERIC_MSGBUF_H
>>
>> #include <asm/bitsperlong.h>
>> +#include <asm-generic/ipcbuf.h>
>> +#include <linux/posix_types.h>
>> +
>> /*
>> * generic msqid64_ds structure.
>> *
>> diff --git a/include/uapi/asm-generic/sembuf.h b/include/uapi/asm-generic/sembuf.h
>> index cbf9cfe977d6..7f37edb95d9f 100644
>> --- a/include/uapi/asm-generic/sembuf.h
>> +++ b/include/uapi/asm-generic/sembuf.h
>> @@ -3,6 +3,8 @@
>> #define __ASM_GENERIC_SEMBUF_H
>>
>> #include <asm/bitsperlong.h>
>> +#include <asm-generic/ipcbuf.h>
>> +#include <linux/posix_types.h>
>>
>> /*
>> * The semid64_ds structure for x86 architecture.
>> diff --git a/include/uapi/asm-generic/shmbuf.h b/include/uapi/asm-generic/shmbuf.h
>> index 2b6c3bb97f97..1c5e7165fca5 100644
>> --- a/include/uapi/asm-generic/shmbuf.h
>> +++ b/include/uapi/asm-generic/shmbuf.h
>> @@ -3,6 +3,8 @@
>> #define __ASM_GENERIC_SHMBUF_H
>>
>> #include <asm/bitsperlong.h>
>> +#include <asm-generic/ipcbuf.h>
>> +#include <stddef.h>
>>
>> /*
>> * The shmid64_ds structure for x86 architecture.
>> diff --git a/include/uapi/asm-generic/ucontext.h b/include/uapi/asm-generic/ucontext.h
>> index 351868a72168..19199f45c523 100644
>> --- a/include/uapi/asm-generic/ucontext.h
>> +++ b/include/uapi/asm-generic/ucontext.h
>> @@ -2,6 +2,11 @@
>> #ifndef __ASM_GENERIC_UCONTEXT_H
>> #define __ASM_GENERIC_UCONTEXT_H
>>
>> +#ifndef __KERNEL__
>> +#include <asm-generic/signal.h>
>> +#include <asm/sigcontext.h>
>> +#endif
>> +
>> struct ucontext {
>> unsigned long uc_flags;
>> struct ucontext *uc_link;
>> diff --git a/include/uapi/linux/agpgart.h b/include/uapi/linux/agpgart.h
>> index f5251045181a..4e828cf487bc 100644
>> --- a/include/uapi/linux/agpgart.h
>> +++ b/include/uapi/linux/agpgart.h
>> @@ -52,7 +52,6 @@
>>
>> #ifndef __KERNEL__
>> #include <linux/types.h>
>> -#include <stdlib.h>
>>
>> struct agp_version {
>> __u16 major;
>> diff --git a/include/uapi/linux/android/binder.h b/include/uapi/linux/android/binder.h
>> index bfaec6903b8b..fd6de2203057 100644
>> --- a/include/uapi/linux/android/binder.h
>> +++ b/include/uapi/linux/android/binder.h
>> @@ -23,6 +23,7 @@
>>
>> #include <linux/types.h>
>> #include <linux/ioctl.h>
>> +#include <sys/types.h>
>>
>> #define B_PACK_CHARS(c1, c2, c3, c4) \
>> ((((c1)<<24)) | (((c2)<<16)) | (((c3)<<8)) | (c4))
>> diff --git a/include/uapi/linux/chio.h b/include/uapi/linux/chio.h
>> index 689fc93fafda..5e63753a0d53 100644
>> --- a/include/uapi/linux/chio.h
>> +++ b/include/uapi/linux/chio.h
>> @@ -3,6 +3,11 @@
>> * ioctl interface for the scsi media changer driver
>> */
>>
>> +#ifndef _UAPI_CHIO_H
>> +#define _UAPI_CHIO_H
>> +
>> +#include <linux/compiler.h>
>> +
>> /* changer element types */
>> #define CHET_MT 0 /* media transport element (robot) */
>> #define CHET_ST 1 /* storage element (media slots) */
>> @@ -167,3 +172,4 @@ struct changer_set_voltag {
>> * c-basic-offset: 8
>> * End:
>> */
>> +#endif
>> diff --git a/include/uapi/linux/coda_psdev.h b/include/uapi/linux/coda_psdev.h
>> index aa6623efd2dd..31b1867021b7 100644
>> --- a/include/uapi/linux/coda_psdev.h
>> +++ b/include/uapi/linux/coda_psdev.h
>> @@ -3,6 +3,7 @@
>> #define _UAPI__CODA_PSDEV_H
>>
>> #include <linux/magic.h>
>> +#include <sys/types.h>
>>
>> #define CODA_PSDEV_MAJOR 67
>> #define MAX_CODADEVS 5 /* how many do we allow */
>> diff --git a/include/uapi/linux/dvb/dmx.h b/include/uapi/linux/dvb/dmx.h
>> index b4112f0b6dd3..ce30e9f6145a 100644
>> --- a/include/uapi/linux/dvb/dmx.h
>> +++ b/include/uapi/linux/dvb/dmx.h
>> @@ -26,9 +26,6 @@
>> #define _UAPI_DVBDMX_H_
>>
>> #include <linux/types.h>
>> -#ifndef __KERNEL__
>> -#include <time.h>
>> -#endif
>>
>>
>> #define DMX_FILTER_SIZE 16
>> diff --git a/include/uapi/linux/dvb/video.h b/include/uapi/linux/dvb/video.h
>> index df3d7028c807..8f3a485b9988 100644
>> --- a/include/uapi/linux/dvb/video.h
>> +++ b/include/uapi/linux/dvb/video.h
>> @@ -26,9 +26,6 @@
>> #define _UAPI_DVBVIDEO_H_
>>
>> #include <linux/types.h>
>> -#ifndef __KERNEL__
>> -#include <time.h>
>> -#endif
>>
>> typedef enum {
>> VIDEO_FORMAT_4_3, /* Select 4:3 format */
>> diff --git a/include/uapi/linux/errqueue.h b/include/uapi/linux/errqueue.h
>> index dc64cfaf13da..ad2421e3d613 100644
>> --- a/include/uapi/linux/errqueue.h
>> +++ b/include/uapi/linux/errqueue.h
>> @@ -2,6 +2,7 @@
>> #ifndef _UAPI_LINUX_ERRQUEUE_H
>> #define _UAPI_LINUX_ERRQUEUE_H
>>
>> +#include <linux/time.h>
>> #include <linux/types.h>
>>
>> struct sock_extended_err {
>> diff --git a/include/uapi/linux/kexec.h b/include/uapi/linux/kexec.h
>> index 6d112868272d..49d50d469723 100644
>> --- a/include/uapi/linux/kexec.h
>> +++ b/include/uapi/linux/kexec.h
>> @@ -8,6 +8,7 @@
>> */
>>
>> #include <linux/types.h>
>> +#include <stddef.h>
>>
>> /* kexec flags for different usage scenarios */
>> #define KEXEC_ON_CRASH 0x00000001
>> diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h
>> index b4f5073dbac2..4a882a133b69 100644
>> --- a/include/uapi/linux/kfd_ioctl.h
>> +++ b/include/uapi/linux/kfd_ioctl.h
>> @@ -25,6 +25,7 @@
>>
>> #include <drm/drm.h>
>> #include <linux/ioctl.h>
>> +#include <stdint.h>
>>
>> #define KFD_IOCTL_MAJOR_VERSION 1
>> #define KFD_IOCTL_MINOR_VERSION 1
>> diff --git a/include/uapi/linux/lightnvm.h b/include/uapi/linux/lightnvm.h
>> index f9a1be7fc696..af28d32b0ac3 100644
>> --- a/include/uapi/linux/lightnvm.h
>> +++ b/include/uapi/linux/lightnvm.h
>> @@ -24,7 +24,6 @@
>> #include <linux/kernel.h>
>> #include <linux/ioctl.h>
>> #else /* __KERNEL__ */
>> -#include <stdio.h>
>> #include <sys/ioctl.h>
>> #define DISK_NAME_LEN 32
>> #endif /* __KERNEL__ */
>> diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h
>> index 7e27070b9440..a89a294e5ca5 100644
>> --- a/include/uapi/linux/ndctl.h
>> +++ b/include/uapi/linux/ndctl.h
>> @@ -13,6 +13,7 @@
>> #ifndef __NDCTL_H__
>> #define __NDCTL_H__
>>
>> +#include <linux/compiler.h>
>> #include <linux/types.h>
>>
>> struct nd_cmd_dimm_flags {
>> diff --git a/include/uapi/linux/netfilter_bridge/ebtables.h b/include/uapi/linux/netfilter_bridge/ebtables.h
>> index 0c7dc8315013..c57850b90b50 100644
>> --- a/include/uapi/linux/netfilter_bridge/ebtables.h
>> +++ b/include/uapi/linux/netfilter_bridge/ebtables.h
>> @@ -16,6 +16,7 @@
>> #include <linux/types.h>
>> #include <linux/if.h>
>> #include <linux/netfilter_bridge.h>
>> +#include <stdint.h>
>>
>> #define EBT_TABLE_MAXNAMELEN 32
>> #define EBT_CHAIN_MAXNAMELEN EBT_TABLE_MAXNAMELEN
>> diff --git a/include/uapi/linux/nfs4_mount.h b/include/uapi/linux/nfs4_mount.h
>> index d20bb869bb99..6c9792073b19 100644
>> --- a/include/uapi/linux/nfs4_mount.h
>> +++ b/include/uapi/linux/nfs4_mount.h
>> @@ -19,6 +19,9 @@
>> */
>> #define NFS4_MOUNT_VERSION 1
>>
>> +#include <linux/socket.h> /* for struct sockaddr. */
>> +#include <linux/compiler.h>
>> +
>> struct nfs_string {
>> unsigned int len;
>> const char __user * data;
>> diff --git a/include/uapi/linux/psp-sev.h b/include/uapi/linux/psp-sev.h
>> index 9008f31c7eb6..c796f1b194a3 100644
>> --- a/include/uapi/linux/psp-sev.h
>> +++ b/include/uapi/linux/psp-sev.h
>> @@ -18,6 +18,7 @@
>> #define __PSP_SEV_USER_H__
>>
>> #include <linux/types.h>
>> +#include <linux/compiler.h>
>>
>> /**
>> * SEV platform commands
>> diff --git a/include/uapi/linux/scc.h b/include/uapi/linux/scc.h
>> index c5bc7f747755..9122d48a4227 100644
>> --- a/include/uapi/linux/scc.h
>> +++ b/include/uapi/linux/scc.h
>> @@ -4,7 +4,7 @@
>> #ifndef _UAPI_SCC_H
>> #define _UAPI_SCC_H
>>
>> -
>> +#include <linux/sockios.h>
>> /* selection of hardware types */
>>
>> #define PA0HZP 0x00 /* hardware type for PA0HZP SCC card and compatible */
>> diff --git a/include/uapi/linux/sctp.h b/include/uapi/linux/sctp.h
>> index b64d583bf053..de4675d92e9f 100644
>> --- a/include/uapi/linux/sctp.h
>> +++ b/include/uapi/linux/sctp.h
>> @@ -56,6 +56,9 @@
>>
>> #include <linux/types.h>
>> #include <linux/socket.h>
>> +#ifndef __KERNEL__
>> +#include <stdint.h>
>> +#endif
>>
>> typedef __s32 sctp_assoc_t;
>>
>> diff --git a/include/uapi/linux/sdla.h b/include/uapi/linux/sdla.h
>> index 1e3735be6511..2a0dc687aa49 100644
>> --- a/include/uapi/linux/sdla.h
>> +++ b/include/uapi/linux/sdla.h
>> @@ -24,6 +24,8 @@
>> #ifndef _UAPISDLA_H
>> #define _UAPISDLA_H
>>
>> +#include <linux/compiler.h>
>> +
>> /* adapter type */
>> #define SDLA_TYPES
>> #define SDLA_S502A 5020
>> diff --git a/include/uapi/linux/socket.h b/include/uapi/linux/socket.h
>> index 8eb96021709c..51c11f6b26e6 100644
>> --- a/include/uapi/linux/socket.h
>> +++ b/include/uapi/linux/socket.h
>> @@ -11,6 +11,10 @@
>>
>> typedef unsigned short __kernel_sa_family_t;
>>
>> +#ifndef __KERNEL__
>> +#include <sys/socket.h> /* for struct sockaddr. */
>> +#endif
>> +
>> struct __kernel_sockaddr_storage {
>> __kernel_sa_family_t ss_family; /* address family */
>> /* Following field(s) are implementation specific */
>> diff --git a/include/uapi/linux/stddef.h b/include/uapi/linux/stddef.h
>> index ee8220f8dcf5..c949a6836417 100644
>> --- a/include/uapi/linux/stddef.h
>> +++ b/include/uapi/linux/stddef.h
>> @@ -1,6 +1,11 @@
>> /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
>> +#ifndef __UAPI_STDDEF_H__
>> +#define __UAPI_STDDEF_H__
>> +
>> #include <linux/compiler_types.h>
>>
>> #ifndef __always_inline
>> #define __always_inline inline
>> #endif
>> +
>> +#endif // __UAPI_STDDEF_H__
>> diff --git a/include/uapi/linux/sysctl.h b/include/uapi/linux/sysctl.h
>> index 6b58371b1f0d..fac6c1c7def2 100644
>> --- a/include/uapi/linux/sysctl.h
>> +++ b/include/uapi/linux/sysctl.h
>> @@ -26,6 +26,7 @@
>> #include <linux/kernel.h>
>> #include <linux/types.h>
>> #include <linux/compiler.h>
>> +#include <stddef.h>
>>
>> #define CTL_MAXNAME 10 /* how many path components do we allow in a
>> call to sysctl? In other words, what is
>> diff --git a/include/uapi/linux/types.h b/include/uapi/linux/types.h
>> index cd4f0b897a48..d61eb82432be 100644
>> --- a/include/uapi/linux/types.h
>> +++ b/include/uapi/linux/types.h
>> @@ -11,6 +11,7 @@
>> #endif /* __EXPORTED_HEADERS__ */
>> #endif
>>
>> +#include <linux/compiler_types.h>
>> #include <linux/posix_types.h>
>>
>>
>> diff --git a/include/uapi/linux/vbox_vmmdev_types.h b/include/uapi/linux/vbox_vmmdev_types.h
>> index 0e68024f36c7..26d0e69f6fdc 100644
>> --- a/include/uapi/linux/vbox_vmmdev_types.h
>> +++ b/include/uapi/linux/vbox_vmmdev_types.h
>> @@ -11,6 +11,7 @@
>>
>> #include <asm/bitsperlong.h>
>> #include <linux/types.h>
>> +#include <linux/compiler.h>
>>
>> /*
>> * We cannot use linux' compiletime_assert here because it expects to be used
>> diff --git a/include/uapi/linux/vboxguest.h b/include/uapi/linux/vboxguest.h
>> index 612f0c7d3558..44606c96f830 100644
>> --- a/include/uapi/linux/vboxguest.h
>> +++ b/include/uapi/linux/vboxguest.h
>> @@ -9,6 +9,7 @@
>> #define __UAPI_VBOXGUEST_H__
>>
>> #include <asm/bitsperlong.h>
>> +#include <linux/compiler.h>
>> #include <linux/ioctl.h>
>> #include <linux/vbox_err.h>
>> #include <linux/vbox_vmmdev_types.h>
>> diff --git a/include/uapi/rdma/hfi/hfi1_user.h b/include/uapi/rdma/hfi/hfi1_user.h
>> index c6a984c0c881..6f5e461b8015 100644
>> --- a/include/uapi/rdma/hfi/hfi1_user.h
>> +++ b/include/uapi/rdma/hfi/hfi1_user.h
>> @@ -58,6 +58,7 @@
>> #define _LINUX__HFI1_USER_H
>>
>> #include <linux/types.h>
>> +#include <linux/compiler.h>
>> #include <rdma/rdma_user_ioctl.h>
>>
>> /*
>> diff --git a/include/uapi/scsi/scsi_bsg_fc.h b/include/uapi/scsi/scsi_bsg_fc.h
>> index 62597d86beed..23971d00c46d 100644
>> --- a/include/uapi/scsi/scsi_bsg_fc.h
>> +++ b/include/uapi/scsi/scsi_bsg_fc.h
>> @@ -23,6 +23,8 @@
>> #ifndef SCSI_BSG_FC_H
>> #define SCSI_BSG_FC_H
>>
>> +#include <stdint.h>
>> +
>> /*
>> * This file intended to be included by both kernel and user space
>> */
>> diff --git a/include/uapi/scsi/scsi_netlink.h b/include/uapi/scsi/scsi_netlink.h
>> index 5ccc2333acab..37d39eb671cc 100644
>> --- a/include/uapi/scsi/scsi_netlink.h
>> +++ b/include/uapi/scsi/scsi_netlink.h
>> @@ -25,6 +25,7 @@
>>
>> #include <linux/netlink.h>
>> #include <linux/types.h>
>> +#include <stdint.h>
>>
>> /*
>> * This file intended to be included by both kernel and user space
>> diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h
>> index ed0a120d4f08..b569f0eb3a7f 100644
>> --- a/include/uapi/sound/asound.h
>> +++ b/include/uapi/sound/asound.h
>> @@ -31,7 +31,7 @@
>> #endif
>>
>> #ifndef __KERNEL__
>> -#include <stdlib.h>
>> +#include<linux/time.h>
>> #endif
>>
>> /*
>> --
>> 2.17.1.1185.g55be947832-goog
>>
>> --
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