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

Use the new kclock decoding mechanism and rename the misnomed
common_clock_get() to posix_clock_realtime_get().

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: <20110201134418.611097203@linutronix.de>
This commit is contained in:
Thomas Gleixner 2011-02-01 13:51:50 +00:00
parent 26f9a4796a
commit 4228577763
1 changed files with 15 additions and 13 deletions
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28
kernel/posix-timers.c
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@ -190,15 +190,6 @@ static inline int common_clock_getres(const clockid_t which_clock,
return 0;
}
/*
* Get real time for posix timers
*/
static int common_clock_get(clockid_t which_clock, struct timespec *tp)
{
ktime_get_real_ts(tp);
return 0;
}
static int common_timer_create(struct k_itimer *new_timer)
{
hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);
@ -226,6 +217,13 @@ static inline int invalid_clockid(const clockid_t which_clock)
return 1;
}
/* Get clock_realtime */
static int posix_clock_realtime_get(clockid_t which_clock, struct timespec *tp)
{
ktime_get_real_ts(tp);
return 0;
}
/* Set clock_realtime */
static int posix_clock_realtime_set(const clockid_t which_clock,
const struct timespec *tp)
@ -277,6 +275,7 @@ static __init int init_posix_timers(void)
{
struct k_clock clock_realtime = {
.clock_getres = hrtimer_get_res,
.clock_get = posix_clock_realtime_get,
.clock_set = posix_clock_realtime_set,
.nsleep = common_nsleep,
.nsleep_restart = hrtimer_nanosleep_restart,
@ -956,18 +955,21 @@ SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
struct timespec __user *,tp)
{
struct k_clock *kc = clockid_to_kclock(which_clock);
struct timespec kernel_tp;
int error;
if (invalid_clockid(which_clock))
if (!kc)
return -EINVAL;
error = CLOCK_DISPATCH(which_clock, clock_get,
(which_clock, &kernel_tp));
if (!kc->clock_get)
return -EOPNOTSUPP;
error = kc->clock_get(which_clock, &kernel_tp);
if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp)))
error = -EFAULT;
return error;
}
SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,