diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-11 18:22:46 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-11 18:22:46 -0800 |
commit | b64c5fda3868cb29d5dae0909561aa7d93fb7330 (patch) | |
tree | 2ac4be822f32fe5a8e8f33138be81b221ff52384 /kernel/time/timekeeping.c | |
parent | f57d54bab696133fae569c5f01352249c36fc74f (diff) | |
parent | 9c3f9e281697d02889c3b08922f3b30be75f56c2 (diff) |
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core timer changes from Ingo Molnar:
"It contains continued generic-NOHZ work by Frederic and smaller
cleanups."
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
time: Kill xtime_lock, replacing it with jiffies_lock
clocksource: arm_generic: use this_cpu_ptr per-cpu helper
clocksource: arm_generic: use integer math helpers
time/jiffies: Make clocksource_jiffies static
clocksource: clean up parse_pmtmr()
tick: Correct the comments for tick_sched_timer()
tick: Conditionally build nohz specific code in tick handler
tick: Consolidate tick handling for high and low res handlers
tick: Consolidate timekeeping handling code
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 e424970bb56..4c7de02eacd 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); } |