AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-24 10:00:51 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

io_uring: remove unnecessary barrier before reading SQ tail

Browse Source 
There is no operation before to order with.

Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Stefan Bühler 2019-04-24 23:54:20 +02:00 committed by Jens Axboe
parent 9e4c15a393
commit 82ab082c0e
1 changed files with 0 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/io_uring.c
View File

@ -1831,8 +1831,6 @@ static bool io_get_sqring(struct io_ring_ctx *ctx, struct sqe_submit *s)
* though the application is the one updating it.
*/
head = ctx->cached_sq_head;
/* See comment at the top of this file */
smp_rmb();
/* make sure SQ entry isn't read before tail */
if (head == smp_load_acquire(&ring->r.tail))
return false;