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| author | Will Deacon <will.deacon@arm.com> | 2017-10-24 11:22:48 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-10-24 13:17:33 +0200 |
| commit | 506458efaf153c1ea480591c5602a5a3ba5a3b76 (patch) | |
| tree | c4ac0a89bf23993036720ec8883fff0740bf9019 /mm/slab.h | |
| parent | 76ebbe78f7390aee075a7f3768af197ded1bdfbb (diff) | |
| download | linux-506458efaf153c1ea480591c5602a5a3ba5a3b76.tar.bz2 | |
locking/barriers: Convert users of lockless_dereference() to READ_ONCE()
READ_ONCE() now has an implicit smp_read_barrier_depends() call, so it
can be used instead of lockless_dereference() without any change in
semantics.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1508840570-22169-4-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'mm/slab.h')
| -rw-r--r-- | mm/slab.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/slab.h b/mm/slab.h index 073362816acc..8894f811a89d 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -258,7 +258,7 @@ cache_from_memcg_idx(struct kmem_cache *s, int idx) * memcg_caches issues a write barrier to match this (see * memcg_create_kmem_cache()). */ - cachep = lockless_dereference(arr->entries[idx]); + cachep = READ_ONCE(arr->entries[idx]); rcu_read_unlock(); return cachep; |