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Subject[tip:timers/core] posix-timers: Convert timer_settime() to clockid_to_kclock()
Commit-ID:  27722df16ef143017db55ac7baac1703a68017ff
Gitweb: http://git.kernel.org/tip/27722df16ef143017db55ac7baac1703a68017ff
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Tue, 1 Feb 2011 13:52:01 +0000
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 2 Feb 2011 15:28:16 +0100

posix-timers: Convert timer_settime() to clockid_to_kclock()

Set the common function for CLOCK_MONOTONIC and CLOCK_REALTIME kclocks
and use the new decoding function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <johnstul@us.ibm.com>
Tested-by: Richard Cochran <richard.cochran@omicron.at>
LKML-Reference: <20110201134419.001863714@linutronix.de>
---
kernel/posix-timers.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 4f71382..a4dbfe7 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -252,6 +252,7 @@ static __init int init_posix_timers(void)
.nsleep = common_nsleep,
.nsleep_restart = hrtimer_nanosleep_restart,
.timer_create = common_timer_create,
+ .timer_set = common_timer_set,
};
struct k_clock clock_monotonic = {
.clock_getres = hrtimer_get_res,
@@ -259,6 +260,7 @@ static __init int init_posix_timers(void)
.nsleep = common_nsleep,
.nsleep_restart = hrtimer_nanosleep_restart,
.timer_create = common_timer_create,
+ .timer_set = common_timer_set,
};
struct k_clock clock_monotonic_raw = {
.clock_getres = hrtimer_get_res,
@@ -814,6 +816,7 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags,
int error = 0;
unsigned long flag;
struct itimerspec *rtn = old_setting ? &old_spec : NULL;
+ struct k_clock *kc;

if (!new_setting)
return -EINVAL;
@@ -829,8 +832,11 @@ retry:
if (!timr)
return -EINVAL;

- error = CLOCK_DISPATCH(timr->it_clock, timer_set,
- (timr, flags, &new_spec, rtn));
+ kc = clockid_to_kclock(timr->it_clock);
+ if (WARN_ON_ONCE(!kc || !kc->timer_set))
+ error = -EINVAL;
+ else
+ error = kc->timer_set(timr, flags, &new_spec, rtn);

unlock_timer(timr, flag);
if (error == TIMER_RETRY) {

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