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| author | Thomas Gleixner <tglx@linutronix.de> | 2011-02-01 16:51:09 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-02-02 17:28:12 +0300 |
| commit | cc785ac22b17ed53e8ff5c1501e422be6d10be3c (patch) | |
| tree | c2e1dc5e367f55882f7abf259a2b4a94beefcc79 | |
| parent | 1976945eeaab5fa461735a6225a82c3cf1e65d62 (diff) | |
| download | linux-cc785ac22b17ed53e8ff5c1501e422be6d10be3c.tar.xz | |
posix-timers: Introduce clockid_to_kclock()
New function to find the kclock for a given clockid.
Returns a pointer to clock_posix_cpu if clockid < 0. If clockid >=
MAXCLOCK or if the clock_getres pointer is not set it returns
NULL. For valid clocks it returns a pointer to the matching
posix_clock.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <johnstul@us.ibm.com>
Acked-by: Richard Cochran <richard.cochran@omicron.at>
LKML-Reference: <20110201134417.938447839@linutronix.de>
| -rw-r--r-- | kernel/posix-timers.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c index e7d26afd8ee5..14b0a70ffb1e 100644 --- a/kernel/posix-timers.c +++ b/kernel/posix-timers.c @@ -531,6 +531,16 @@ static void release_posix_timer(struct k_itimer *tmr, int it_id_set) kmem_cache_free(posix_timers_cache, tmr); } +static struct k_clock *clockid_to_kclock(const clockid_t id) +{ + if (id < 0) + return &clock_posix_cpu; + + if (id >= MAX_CLOCKS || !posix_clocks[id].clock_getres) + return NULL; + return &posix_clocks[id]; +} + /* Create a POSIX.1b interval timer. */ SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock, |