1 files changed, 6 insertions, 0 deletions

diff --git a/fs/aio.c b/fs/aio.c
index 97bc62cbe2da..5f2e9c6c328e 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1111,6 +1111,12 @@ static long aio_read_events_ring(struct kioctx *ctx,
         tail = ring->tail;
         kunmap_atomic(ring);
 
+        /*
+         * Ensure that once we've read the current tail pointer, that
+         * we also see the events that were stored up to the tail.
+         */
+        smp_rmb();
+
         pr_debug("h%u t%u m%u\n", head, tail, ctx->nr_events);
 
         if (head == tail)