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time: Provide y2038 safe timekeeping_inject_sleeptime() replacement 

As part of addressing "y2038 problem" for in-kernel uses, this
patch adds timekeeping_inject_sleeptime64() using timespec64.

After this patch, timekeeping_inject_sleeptime() is deprecated
and all its call sites will be fixed using the new interface,
after that it can be removed.

NOTE: timekeeping_inject_sleeptime() is safe actually, but we
want to eliminate timespec eventually, so comes this patch.

Signed-off-by: pang.xunlei <pang.xunlei@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
pang.xunlei 2014-11-18 19:15:17 +08:00 committed by John Stultz
parent 21f7eca555
commit 04d9089086
2 changed files with 16 additions and 7 deletions
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13
include/linux/timekeeping.h
View File

@ -201,7 +201,18 @@ static inline void timekeeping_clocktai(struct timespec *ts)
/*
* RTC specific
*/
extern void timekeeping_inject_sleeptime(struct timespec *delta);
extern void timekeeping_inject_sleeptime64(struct timespec64 *delta);
/**
* Deprecated. Use timekeeping_inject_sleeptime64().
*/
static inline void timekeeping_inject_sleeptime(struct timespec *delta)
{
struct timespec64 delta64;
delta64 = timespec_to_timespec64(*delta);
timekeeping_inject_sleeptime64(&delta64);
}
/*
* PPS accessor

10
kernel/time/timekeeping.c
View File

@ -1067,8 +1067,8 @@ static void __timekeeping_inject_sleeptime(struct timekeeper *tk,
}
/**
* timekeeping_inject_sleeptime - Adds suspend interval to timeekeeping values
* @delta: pointer to a timespec delta value
* timekeeping_inject_sleeptime64 - Adds suspend interval to timeekeeping values
* @delta: pointer to a timespec64 delta value
*
* This hook is for architectures that cannot support read_persistent_clock
* because their RTC/persistent clock is only accessible when irqs are enabled.
@ -1076,10 +1076,9 @@ static void __timekeeping_inject_sleeptime(struct timekeeper *tk,
* This function should only be called by rtc_resume(), and allows
* a suspend offset to be injected into the timekeeping values.
*/
void timekeeping_inject_sleeptime(struct timespec *delta)
void timekeeping_inject_sleeptime64(struct timespec64 *delta)
{
struct timekeeper *tk = &tk_core.timekeeper;
struct timespec64 tmp;
unsigned long flags;
/*
@ -1094,8 +1093,7 @@ void timekeeping_inject_sleeptime(struct timespec *delta)
timekeeping_forward_now(tk);
tmp = timespec_to_timespec64(*delta);
__timekeeping_inject_sleeptime(tk, &tmp);
__timekeeping_inject_sleeptime(tk, delta);
timekeeping_update(tk, TK_CLEAR_NTP | TK_MIRROR | TK_CLOCK_WAS_SET);