Messages in this thread Patch in this message | | | From | Pranith Kumar <> | Subject | [PATCH v2 5/9] percpu: Replace smp_read_barrier_depends() with lockless_dereference() | Date | Fri, 21 Nov 2014 10:05:59 -0500 |
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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> --- include/linux/percpu-refcount.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/include/linux/percpu-refcount.h b/include/linux/percpu-refcount.h index 494ab05..3cf6759 100644 --- a/include/linux/percpu-refcount.h +++ b/include/linux/percpu-refcount.h @@ -128,10 +128,8 @@ static inline void percpu_ref_kill(struct percpu_ref *ref) static inline bool __ref_is_percpu(struct percpu_ref *ref, unsigned long __percpu **percpu_countp) { - unsigned long percpu_ptr = ACCESS_ONCE(ref->percpu_count_ptr); - /* paired with smp_store_release() in percpu_ref_reinit() */ - smp_read_barrier_depends(); + unsigned long percpu_ptr = lockless_dereference(ref->percpu_count_ptr); if (unlikely(percpu_ptr & __PERCPU_REF_ATOMIC)) return false; -- 1.9.1
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