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 <[email protected]> --- mm/slab.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/mm/slab.h b/mm/slab.h index 3347fd7..1cf40054 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -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; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
