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Subject[PATCH] hrtimer: constify read-only parameters
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
---
include/linux/hrtimer.h | 12 +++++++-----
kernel/hrtimer.c | 18 +++++++++++-------
2 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index f376ddc..7beb09c 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -407,20 +407,22 @@ static inline u64 hrtimer_forward_now(struct hrtimer *timer,
}

/* Precise sleep: */
-extern long hrtimer_nanosleep(struct timespec *rqtp,
+extern long hrtimer_nanosleep(const struct timespec *rqtp,
struct timespec __user *rmtp,
const enum hrtimer_mode mode,
const clockid_t clockid);
-extern long hrtimer_nanosleep_restart(struct restart_block *restart_block);
+extern long
+hrtimer_nanosleep_restart(const struct restart_block *restart_block);

extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl,
struct task_struct *tsk);

-extern int schedule_hrtimeout_range(ktime_t *expires, unsigned long delta,
+extern int schedule_hrtimeout_range(const ktime_t *expires, unsigned long delta,
const enum hrtimer_mode mode);
-extern int schedule_hrtimeout_range_clock(ktime_t *expires,
+extern int schedule_hrtimeout_range_clock(const ktime_t *expires,
unsigned long delta, const enum hrtimer_mode mode, int clock);
-extern int schedule_hrtimeout(ktime_t *expires, const enum hrtimer_mode mode);
+extern int schedule_hrtimeout(const ktime_t *expires,
+ const enum hrtimer_mode mode);

/* Soft interrupt function to run the hrtimer queues: */
extern void hrtimer_run_queues(void);
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 0c8d7c0..1de816f 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1491,7 +1491,8 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod
return t->task == NULL;
}

-static int update_rmtp(struct hrtimer *timer, struct timespec __user *rmtp)
+static int update_rmtp(const struct hrtimer *timer,
+ struct timespec __user *rmtp)
{
struct timespec rmt;
ktime_t rem;
@@ -1507,7 +1508,7 @@ static int update_rmtp(struct hrtimer *timer, struct timespec __user *rmtp)
return 1;
}

-long __sched hrtimer_nanosleep_restart(struct restart_block *restart)
+long __sched hrtimer_nanosleep_restart(const struct restart_block *restart)
{
struct hrtimer_sleeper t;
struct timespec __user *rmtp;
@@ -1534,8 +1535,10 @@ out:
return ret;
}

-long hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp,
- const enum hrtimer_mode mode, const clockid_t clockid)
+long hrtimer_nanosleep(const struct timespec *rqtp,
+ struct timespec __user *rmtp,
+ const enum hrtimer_mode mode,
+ const clockid_t clockid)
{
struct restart_block *restart;
struct hrtimer_sleeper t;
@@ -1730,7 +1733,7 @@ void __init hrtimers_init(void)
* @clock: timer clock, CLOCK_MONOTONIC or CLOCK_REALTIME
*/
int __sched
-schedule_hrtimeout_range_clock(ktime_t *expires, unsigned long delta,
+schedule_hrtimeout_range_clock(const ktime_t *expires, unsigned long delta,
const enum hrtimer_mode mode, int clock)
{
struct hrtimer_sleeper t;
@@ -1801,7 +1804,8 @@ schedule_hrtimeout_range_clock(ktime_t *expires, unsigned long delta,
*
* Returns 0 when the timer has expired otherwise -EINTR
*/
-int __sched schedule_hrtimeout_range(ktime_t *expires, unsigned long delta,
+int __sched schedule_hrtimeout_range(const ktime_t *expires,
+ unsigned long delta,
const enum hrtimer_mode mode)
{
return schedule_hrtimeout_range_clock(expires, delta, mode,
@@ -1831,7 +1835,7 @@ EXPORT_SYMBOL_GPL(schedule_hrtimeout_range);
*
* Returns 0 when the timer has expired otherwise -EINTR
*/
-int __sched schedule_hrtimeout(ktime_t *expires,
+int __sched schedule_hrtimeout(const ktime_t *expires,
const enum hrtimer_mode mode)
{
return schedule_hrtimeout_range(expires, 0, mode);
--
1.7.4.rc3


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