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include/linux: Remove smp_read_barrier_depends() from comments 

smp_read_barrier_depends() doesn't exist any more, so reword the two
comments that mention it to refer to "dependency ordering" instead.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Will Deacon 2019-11-07 14:46:59 +00:00
parent 628fd55671
commit c6cd2e0116
2 changed files with 2 additions and 2 deletions
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2
include/linux/percpu-refcount.h
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@ -155,7 +155,7 @@ static inline bool __ref_is_percpu(struct percpu_ref *ref,
* between contaminating the pointer value, meaning that
* READ_ONCE() is required when fetching it.
*
* The smp_read_barrier_depends() implied by READ_ONCE() pairs
* The dependency ordering from the READ_ONCE() pairs
* with smp_store_release() in __percpu_ref_switch_to_percpu().
*/
percpu_ptr = READ_ONCE(ref->percpu_count_ptr);

2
include/linux/ptr_ring.h
View File

@ -107,7 +107,7 @@ static inline int __ptr_ring_produce(struct ptr_ring *r, void *ptr)
return -ENOSPC;
/* Make sure the pointer we are storing points to a valid data. */
/* Pairs with smp_read_barrier_depends in __ptr_ring_consume. */
/* Pairs with the dependency ordering in __ptr_ring_consume. */
smp_wmb();
WRITE_ONCE(r->queue[r->producer++], ptr);