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(parent: e6c80cd) | patch
seqlock: Introduce raw_read_seqcount_latch()
authorPeter Zijlstra <peterz@infradead.org>
Wed, 27 May 2015 01:39:36 +0000 (11:09 +0930)
committerRusty Russell <rusty@rustcorp.com.au>
Thu, 28 May 2015 02:02:06 +0000 (11:32 +0930)
commit7e7bf5eb3727f2e2d6a590f626fc855940e3c089
tree69fecbbe48ac91608e88987c0bd0c8e5cebfa1b5tree | snapshot
parente6c80cd570112cec85c637d67812c63ff052baddcommit | diff
seqlock: Introduce raw_read_seqcount_latch()

Because with latches there is a strict data dependency on the seq load
we can avoid the rmb in favour of a read_barrier_depends.

Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
include/linux/seqlock.h diff | blob | history
kernel/time/timekeeping.c diff | blob | history
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