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| author | Torben Hohn <torbenh@gmx.de> | 2011-01-27 15:59:05 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-01-31 14:55:42 +0100 |
| commit | 48cf76f7104f655bbd48a75c7759dce82c3e1ab6 (patch) | |
| tree | 2b3cf138fd277ba9c551d75ccbe575a40974560a /kernel/time | |
| parent | fbad1ea94159a71bc0f68b00e57ae803606af9fb (diff) | |
| download | linux-48cf76f7104f655bbd48a75c7759dce82c3e1ab6.tar.gz linux-48cf76f7104f655bbd48a75c7759dce82c3e1ab6.tar.bz2 linux-48cf76f7104f655bbd48a75c7759dce82c3e1ab6.zip | |
time: Provide get_xtime_and_monotonic_offset()
The hrtimer code accesses timekeeping variables under
xtime_lock. Provide a sensible accessor function and use it.
[ tglx: Removed the conditionals, unused variable, fixed codingstyle
and massaged changelog ]
Signed-off-by: Torben Hohn <torbenh@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: johnstul@us.ibm.com
Cc: yong.zhang0@gmail.com
Cc: hch@infradead.org
LKML-Reference: <20110127145905.23248.30458.stgit@localhost>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/timekeeping.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index c1a178ca0f50..c50aaf6cd01d 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -958,3 +958,19 @@ void do_timer(unsigned long ticks) update_wall_time(); calc_global_load(ticks); } + +/** + * get_xtime_and_monotonic_offset() - get xtime and wall_to_monotonic + * @xtim: pointer to timespec to be set with xtime + * @wtom: pointer to timespec to be set with wall_to_monotonic + */ +void get_xtime_and_monotonic_offset(struct timespec *xtim, struct timespec *wtom) +{ + unsigned long seq; + + do { + seq = read_seqbegin(&xtime_lock); + *xtim = xtime; + *wtom = wall_to_monotonic; + } while (read_seqretry(&xtime_lock, seq)); +} |