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| author | Stefan Bühler <source@stbuehler.de> | 2019-04-24 23:54:19 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-04-30 17:40:02 +0200 |
| commit | 9e4c15a3939448d2ea9b9bf59561183bbe3fdc49 (patch) | |
| tree | 0398c86af28cbb6961ffd48ac458552e25f6be0f /fs/io_uring.c | |
| parent | io_uring: remove unnecessary barrier before reading cq head (diff) | |
| download | linux-9e4c15a3939448d2ea9b9bf59561183bbe3fdc49.tar.xz linux-9e4c15a3939448d2ea9b9bf59561183bbe3fdc49.zip | |
io_uring: remove unnecessary barrier after updating SQ head
There is no operation afterwards to order with.
Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 3671a654a146..d3c57ee233fe 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -1798,12 +1798,6 @@ static void io_commit_sqring(struct io_ring_ctx *ctx) * write new data to them. */ smp_store_release(&ring->r.head, ctx->cached_sq_head); - - /* - * write side barrier of head update, app has read side. See - * comment at the top of this file - */ - smp_wmb(); } } |