diff options
| author | John Stultz <john.stultz@linaro.org> | 2012-02-28 16:50:11 -0800 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2012-11-13 14:08:23 -0500 |
| commit | d6ad418763888f617ac5b4849823e4cd670df1dd (patch) | |
| tree | 92d75b05849f98e1a20eb8fa8bb8a26818707cd2 /kernel/time/timekeeping.c | |
| parent | 47c8c91b2d60006df22146effe79ac4cdafd9205 (diff) | |
| download | blackbird-op-linux-d6ad418763888f617ac5b4849823e4cd670df1dd.tar.gz blackbird-op-linux-d6ad418763888f617ac5b4849823e4cd670df1dd.zip | |
time: Kill xtime_lock, replacing it with jiffies_lock
Now that timekeeping is protected by its own locks, rename
the xtime_lock to jifffies_lock to better describe what it
protects.
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'kernel/time/timekeeping.c')
| -rw-r--r-- | kernel/time/timekeeping.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index e424970bb562..4c7de02eacdc 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -25,12 +25,6 @@ static struct timekeeper timekeeper; -/* - * This read-write spinlock protects us from races in SMP while - * playing with xtime. - */ -__cacheline_aligned_in_smp DEFINE_SEQLOCK(xtime_lock); - /* flag for if timekeeping is suspended */ int __read_mostly timekeeping_suspended; @@ -1299,9 +1293,7 @@ struct timespec get_monotonic_coarse(void) } /* - * The 64-bit jiffies value is not atomic - you MUST NOT read it - * without sampling the sequence number in xtime_lock. - * jiffies is defined in the linker script... + * Must hold jiffies_lock */ void do_timer(unsigned long ticks) { @@ -1389,7 +1381,7 @@ EXPORT_SYMBOL_GPL(ktime_get_monotonic_offset); */ void xtime_update(unsigned long ticks) { - write_seqlock(&xtime_lock); + write_seqlock(&jiffies_lock); do_timer(ticks); - write_sequnlock(&xtime_lock); + write_sequnlock(&jiffies_lock); } |
