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authorThomas Gleixner <tglx@linutronix.de>2017-06-13 23:34:33 +0200
committerThomas Gleixner <tglx@linutronix.de>2017-06-14 00:00:47 +0200
commit938e7cf2d569833a5acf689a8926faf507826253 (patch)
tree01d395220896e3d1508edbdca5fbb18dd900a702
parent343d8fc208e43e50525ae6e0fc4845b9966b7318 (diff)
posix-timers: Make nanosleep timespec argument const
No nanosleep implementation modifies the rqtp argument. Mark is const. Signed-off-by: Thomas 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>
-rw-r--r--include/linux/hrtimer.h2
-rw-r--r--kernel/time/alarmtimer.c2
-rw-r--r--kernel/time/hrtimer.c2
-rw-r--r--kernel/time/posix-cpu-timers.c4
-rw-r--r--kernel/time/posix-timers.c4
-rw-r--r--kernel/time/posix-timers.h2
6 files changed, 8 insertions, 8 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index d83b7ed1cb0e..255edd5e7a74 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -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);
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 7bed4e44f9bd..c991cf212c6d 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -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;
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index 45f83cc7c0c7..81da124f1115 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -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;
diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c
index 3adfa42ca24c..9df618ee64cf 100644
--- a/kernel/time/posix-cpu-timers.c
+++ b/kernel/time/posix-cpu-timers.c
@@ -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);
}
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index c9f45a84fb8b..82d67be7d9d1 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -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);
}
diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h
index 5e69bb85629f..fb303c3be4d3 100644
--- a/kernel/time/posix-timers.h
+++ b/kernel/time/posix-timers.h
@@ -10,7 +10,7 @@ struct k_clock {
int (*clock_adj)(const clockid_t which_clock, struct timex *tx);
int (*timer_create)(struct k_itimer *timer);
int (*nsleep)(const clockid_t which_clock, int flags,
- struct timespec64 *);
+ const struct timespec64 *);
int (*timer_set)(struct k_itimer *timr, int flags,
struct itimerspec64 *new_setting,
struct itimerspec64 *old_setting);