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Commit 938e7cf2 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

posix-timers: Make nanosleep timespec argument const 



No nanosleep implementation modifies the rqtp argument. Mark is const.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
parent 343d8fc2

include/linux/hrtimer.h

+1 −1
Original line number Diff line number Diff line
@@ -454,7 +454,7 @@ static inline u64 hrtimer_forward_now(struct hrtimer *timer, 
/* Precise sleep: */



extern int nanosleep_copyout(struct restart_block *, struct timespec *);

extern long hrtimer_nanosleep(struct timespec64 *rqtp,

extern long hrtimer_nanosleep(const struct timespec64 *rqtp,

			      const enum hrtimer_mode mode,

			      const clockid_t clockid);

kernel/time/alarmtimer.c

+1 −1
Original line number Diff line number Diff line
@@ -753,7 +753,7 @@ static long __sched alarm_timer_nsleep_restart(struct restart_block *restart) 
 * Handles clock_nanosleep calls against _ALARM clockids

 */

static int alarm_timer_nsleep(const clockid_t which_clock, int flags,

			      struct timespec64 *tsreq)

			      const struct timespec64 *tsreq)

{

	enum  alarmtimer_type type = clock2alarm(which_clock);

	struct restart_block *restart = &current->restart_block;

kernel/time/hrtimer.c

+1 −1
Original line number Diff line number Diff line
@@ -1510,7 +1510,7 @@ static long __sched hrtimer_nanosleep_restart(struct restart_block *restart) 
	return ret;

}



long hrtimer_nanosleep(struct timespec64 *rqtp,

long hrtimer_nanosleep(const struct timespec64 *rqtp,

		       const enum hrtimer_mode mode, const clockid_t clockid)

{

	struct restart_block *restart;

kernel/time/posix-cpu-timers.c

+2 −2
Original line number Diff line number Diff line
@@ -1328,7 +1328,7 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, 
static long posix_cpu_nsleep_restart(struct restart_block *restart_block);



static int posix_cpu_nsleep(const clockid_t which_clock, int flags,

			    struct timespec64 *rqtp)

			    const struct timespec64 *rqtp)

{

	struct restart_block *restart_block = &current->restart_block;

	int error;
@@ -1383,7 +1383,7 @@ static int process_cpu_timer_create(struct k_itimer *timer) 
	return posix_cpu_timer_create(timer);

}

static int process_cpu_nsleep(const clockid_t which_clock, int flags,

			      struct timespec64 *rqtp)

			      const struct timespec64 *rqtp)

{

	return posix_cpu_nsleep(PROCESS_CLOCK, flags, rqtp);

}

kernel/time/posix-timers.c

+2 −2
Original line number Diff line number Diff line
@@ -1214,9 +1214,9 @@ COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock, 
 * nanosleep for monotonic and realtime clocks

 */

static int common_nsleep(const clockid_t which_clock, int flags,

			 struct timespec64 *tsave)

			 const struct timespec64 *rqtp)

{

	return hrtimer_nanosleep(tsave, flags & TIMER_ABSTIME ?

	return hrtimer_nanosleep(rqtp, flags & TIMER_ABSTIME ?

				 HRTIMER_MODE_ABS : HRTIMER_MODE_REL,

				 which_clock);

}