| Date | Wed, 2 Feb 2011 21:56:37 GMT | From | tip-bot for Thomas Gleixner <> | Subject | [tip:timers/core] posix-timers: Introduce clockid_to_kclock() |
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Commit-ID: cc785ac22b17ed53e8ff5c1501e422be6d10be3c Gitweb: http://git.kernel.org/tip/cc785ac22b17ed53e8ff5c1501e422be6d10be3c Author: Thomas Gleixner <tglx@linutronix.de> AuthorDate: Tue, 1 Feb 2011 13:51:09 +0000 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Wed, 2 Feb 2011 15:28:12 +0100
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> --- 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 e7d26af..14b0a70 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,
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