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time: Introduce do_sys_settimeofday64()

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The do_sys_settimeofday() function uses a timespec, which is not year
2038 safe on 32bit systems.

Thus this patch introduces do_sys_settimeofday64(), which allows us to
transition users of do_sys_settimeofday() to using 64bit time types.

Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
[jstultz: Include errno-base.h to avoid build issue on some arches]
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
Baolin Wang 2016-04-08 14:02:12 +08:00 committed by John Stultz
parent 457db29bfc
commit 86d3473224
2 changed files with 19 additions and 6 deletions
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17
include/linux/timekeeping.h
View File

@ -1,6 +1,8 @@
#ifndef _LINUX_TIMEKEEPING_H
#define _LINUX_TIMEKEEPING_H
#include <asm-generic/errno-base.h>
/* Included from linux/ktime.h */
void timekeeping_init(void);
@ -11,8 +13,19 @@ extern int timekeeping_suspended;
*/
extern void do_gettimeofday(struct timeval *tv);
extern int do_settimeofday64(const struct timespec64 *ts);
extern int do_sys_settimeofday(const struct timespec *tv,
const struct timezone *tz);
extern int do_sys_settimeofday64(const struct timespec64 *tv,
const struct timezone *tz);
static inline int do_sys_settimeofday(const struct timespec *tv,
const struct timezone *tz)
{
struct timespec64 ts64;
if (!tv)
return -EINVAL;
ts64 = timespec_to_timespec64(*tv);
return do_sys_settimeofday64(&ts64, tz);
}
/*
* Kernel time accessors

8
kernel/time/time.c
View File

@ -160,15 +160,15 @@ static inline void warp_clock(void)
* various programs will get confused when the clock gets warped.
*/
int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz)
int do_sys_settimeofday64(const struct timespec64 *tv, const struct timezone *tz)
{
static int firsttime = 1;
int error = 0;
if (tv && !timespec_valid(tv))
if (tv && !timespec64_valid(tv))
return -EINVAL;
error = security_settime(tv, tz);
error = security_settime64(tv, tz);
if (error)
return error;
@ -186,7 +186,7 @@ int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz)
}
}
if (tv)
return do_settimeofday(tv);
return do_settimeofday64(tv);
return 0;
}