mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-25 21:24:08 +08:00
slab: replace smp_read_barrier_depends() with lockless_dereference()
Recently lockless_dereference() was added which can be used in place of hard-coding smp_read_barrier_depends(). The following PATCH makes the change. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
c871ac4e96
commit
8df0c2dcf6
@ -209,15 +209,15 @@ cache_from_memcg_idx(struct kmem_cache *s, int idx)
|
||||
|
||||
rcu_read_lock();
|
||||
params = rcu_dereference(s->memcg_params);
|
||||
cachep = params->memcg_caches[idx];
|
||||
rcu_read_unlock();
|
||||
|
||||
/*
|
||||
* Make sure we will access the up-to-date value. The code updating
|
||||
* memcg_caches issues a write barrier to match this (see
|
||||
* memcg_register_cache()).
|
||||
*/
|
||||
smp_read_barrier_depends();
|
||||
cachep = lockless_dereference(params->memcg_caches[idx]);
|
||||
rcu_read_unlock();
|
||||
|
||||
return cachep;
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user