From: Bart Van Assche <bvanassche@acm.org>
Date: Sun, 21 Jun 2020 21:16:59 +0000 (-0700)
Subject: engines/libaio: Use atomic_store_release() instead of read_barrier()
X-Git-Tag: fio-3.21~28^2~6
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=d473a06da1630905e65868630c67d5043a9e76f2;p=fio.git

engines/libaio: Use atomic_store_release() instead of read_barrier()

This is a micro-optimization that does not affect the functionality of the
code.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---

diff --git a/engines/libaio.c b/engines/libaio.c
index daa576da..398fdf91 100644
--- a/engines/libaio.c
+++ b/engines/libaio.c
@@ -195,8 +195,8 @@ static int user_io_getevents(io_context_t aio_ctx, unsigned int max,
 		} else {
 			/* There is another completion to reap */
 			events[i] = ring->events[head];
-			read_barrier();
-			ring->head = (head + 1) % ring->nr;
+			atomic_store_release(&ring->head,
+					     (head + 1) % ring->nr);
 			i++;
 		}
 	}