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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>
This commit is contained in:
Thomas Gleixner 2017-06-13 23:34:33 +02:00
parent 343d8fc208
commit 938e7cf2d5
6 changed files with 8 additions and 8 deletions
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2
include/linux/hrtimer.h
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@ -454,7 +454,7 @@ static inline u64 hrtimer_forward_now(struct hrtimer *timer,
/* Precise sleep: */ /* Precise sleep: */
extern int nanosleep_copyout(struct restart_block *, struct timespec *); 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 enum hrtimer_mode mode,
const clockid_t clockid); const clockid_t clockid);

2
kernel/time/alarmtimer.c
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@ -753,7 +753,7 @@ static long __sched alarm_timer_nsleep_restart(struct restart_block *restart)
* Handles clock_nanosleep calls against _ALARM clockids * Handles clock_nanosleep calls against _ALARM clockids
*/ */
static int alarm_timer_nsleep(const clockid_t which_clock, int flags, 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); enum alarmtimer_type type = clock2alarm(which_clock);
struct restart_block *restart = &current->restart_block; struct restart_block *restart = &current->restart_block;

2
kernel/time/hrtimer.c
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@ -1510,7 +1510,7 @@ static long __sched hrtimer_nanosleep_restart(struct restart_block *restart)
return ret; return ret;
} }
long hrtimer_nanosleep(struct timespec64 *rqtp, long hrtimer_nanosleep(const struct timespec64 *rqtp,
const enum hrtimer_mode mode, const clockid_t clockid) const enum hrtimer_mode mode, const clockid_t clockid)
{ {
struct restart_block *restart; struct restart_block *restart;

4
kernel/time/posix-cpu-timers.c
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@ -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 long posix_cpu_nsleep_restart(struct restart_block *restart_block);
static int posix_cpu_nsleep(const clockid_t which_clock, int flags, 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; struct restart_block *restart_block = &current->restart_block;
int error; int error;
@ -1383,7 +1383,7 @@ static int process_cpu_timer_create(struct k_itimer *timer)
return posix_cpu_timer_create(timer); return posix_cpu_timer_create(timer);
} }
static int process_cpu_nsleep(const clockid_t which_clock, int flags, 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); return posix_cpu_nsleep(PROCESS_CLOCK, flags, rqtp);
} }

4
kernel/time/posix-timers.c
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@ -1214,9 +1214,9 @@ COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock,
* nanosleep for monotonic and realtime clocks * nanosleep for monotonic and realtime clocks
*/ */
static int common_nsleep(const clockid_t which_clock, int flags, 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, HRTIMER_MODE_ABS : HRTIMER_MODE_REL,
which_clock); which_clock);
} }

2
kernel/time/posix-timers.h
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@ -10,7 +10,7 @@ struct k_clock {
int (*clock_adj)(const clockid_t which_clock, struct timex *tx); int (*clock_adj)(const clockid_t which_clock, struct timex *tx);
int (*timer_create)(struct k_itimer *timer); int (*timer_create)(struct k_itimer *timer);
int (*nsleep)(const clockid_t which_clock, int flags, int (*nsleep)(const clockid_t which_clock, int flags,
struct timespec64 *); const struct timespec64 *);
int (*timer_set)(struct k_itimer *timr, int flags, int (*timer_set)(struct k_itimer *timr, int flags,
struct itimerspec64 *new_setting, struct itimerspec64 *new_setting,
struct itimerspec64 *old_setting); struct itimerspec64 *old_setting);