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| author | Richard Cochran <richardcochran@gmail.com> | 2011-02-01 13:52:26 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-02-02 15:28:19 +0100 |
| commit | f1f1d5ebd10ffa4242bce7a90a56a222d6b7bc77 (patch) | |
| tree | ca04ea979512e0037c52bca855dbf050b1b08360 /include/linux/posix-timers.h | |
| parent | 65f5d80bdf83ec0d7f3887db10153bf3f36ed73c (diff) | |
| download | lwn-f1f1d5ebd10ffa4242bce7a90a56a222d6b7bc77.tar.gz lwn-f1f1d5ebd10ffa4242bce7a90a56a222d6b7bc77.zip | |
posix-timers: Introduce a syscall for clock tuning.
A new syscall is introduced that allows tuning of a POSIX clock. The
new call, clock_adjtime, takes two parameters, the clock ID and a
pointer to a struct timex. Any ADJTIMEX(2) operation may be requested
via this system call, but various POSIX clocks may or may not support
tuning.
[ tglx: Adapted to the posix-timer cleanup series. Avoid copy_to_user
in the error case ]
Signed-off-by: Richard Cochran <richard.cochran@omicron.at>
Acked-by: John Stultz <johnstul@us.ibm.com>
LKML-Reference: <20110201134419.869804645@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/posix-timers.h')
| -rw-r--r-- | include/linux/posix-timers.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 8206255a547c..79a1cea7f6ed 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -4,6 +4,7 @@ #include <linux/spinlock.h> #include <linux/list.h> #include <linux/sched.h> +#include <linux/timex.h> union cpu_time_count { cputime_t cpu; @@ -71,6 +72,7 @@ struct k_clock { int (*clock_set) (const clockid_t which_clock, const struct timespec *tp); int (*clock_get) (const clockid_t which_clock, struct timespec * tp); + int (*clock_adj) (const clockid_t which_clock, struct timex *tx); int (*timer_create) (struct k_itimer *timer); int (*nsleep) (const clockid_t which_clock, int flags, struct timespec *, struct timespec __user *); |