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Subject[tip:timers/core] posix-timers: Convert clock_gettime() to clockid_to_kclock()
Commit-ID:  42285777631aa0654fbb6442057b3e176445c6c5
Gitweb: http://git.kernel.org/tip/42285777631aa0654fbb6442057b3e176445c6c5
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Tue, 1 Feb 2011 13:51:50 +0000
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 2 Feb 2011 15:28:14 +0100

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>
---
kernel/posix-timers.c | 28 +++++++++++++++-------------
1 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 49f358c..d9e5edf 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -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,

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