seqlock: Introduce raw_read_seqcount_latch()

Browse source

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>

...

This commit is contained in:

Peter Zijlstra 2015-05-27 11:09:36 +09:30 • committed by Rusty Russell

parent 0a04b01669

commit 7fc26327b7

2 changed files with 8 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

9

include/linux/seqlock.h

View file

2

kernel/time/timekeeping.c

View file