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-rw-r--r--kernel/events/ring_buffer.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c
index d32b9375ec0e..12f351b253bb 100644
--- a/kernel/events/ring_buffer.c
+++ b/kernel/events/ring_buffer.c
@@ -101,7 +101,7 @@ again:
* See perf_output_begin().
*/
smp_wmb(); /* B, matches C */
- rb->user_page->data_head = head;
+ WRITE_ONCE(rb->user_page->data_head, head);
/*
* We must publish the head before decrementing the nest count,
@@ -490,7 +490,7 @@ void perf_aux_output_end(struct perf_output_handle *handle, unsigned long size)
handle->aux_flags);
}
- rb->user_page->aux_head = rb->aux_head;
+ WRITE_ONCE(rb->user_page->aux_head, rb->aux_head);
if (rb_need_aux_wakeup(rb))
wakeup = true;
@@ -522,7 +522,7 @@ int perf_aux_output_skip(struct perf_output_handle *handle, unsigned long size)
rb->aux_head += size;
- rb->user_page->aux_head = rb->aux_head;
+ WRITE_ONCE(rb->user_page->aux_head, rb->aux_head);
if (rb_need_aux_wakeup(rb)) {
perf_output_wakeup(handle);
handle->wakeup = rb->aux_wakeup + rb->aux_watermark;