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-rw-r--r--fs/io_uring.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 41e3a6f6a096..69910fd9ccca 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1865,7 +1865,8 @@ static int io_sq_thread(void *data)
/* Tell userspace we may need a wakeup call */
ctx->sq_ring->flags |= IORING_SQ_NEED_WAKEUP;
- smp_wmb();
+ /* make sure to read SQ tail after writing flags */
+ smp_mb();
if (!io_get_sqring(ctx, &sqes[0])) {
if (kthread_should_stop()) {