Commit 04d90890 authored by pang.xunlei's avatar pang.xunlei Committed by John Stultz
Browse files

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: default avatarpang.xunlei <pang.xunlei@linaro.org>
Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
parent 21f7eca5

include/linux/timekeeping.h

+12 −1
Original line number Diff line number Diff line
@@ -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

kernel/time/timekeeping.c

+4 −6
Original line number Diff line number Diff line
@@ -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);

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