hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

io_uring: use wait_event_interruptible for cq_wait conditional wait 

The previous patch has ensured that io_cqring_events contain
smp_rmb memory barriers, Now we can use wait_event_interruptible
to keep the code simple.

Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jackie Liu 2019-05-16 11:46:31 +08:00 committed by Jens Axboe
parent dc6ce4bc2b
commit fdb288a679
1 changed files with 2 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
fs/io_uring.c
View File

@ -2181,7 +2181,6 @@ static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events,
{
struct io_cq_ring *ring = ctx->cq_ring;
sigset_t ksigmask, sigsaved;
DEFINE_WAIT(wait);
int ret;
if (io_cqring_events(ring) >= min_events)
@ -2201,21 +2200,9 @@ static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events,
return ret;
}
do {
prepare_to_wait(&ctx->wait, &wait, TASK_INTERRUPTIBLE);
ret = 0;
if (io_cqring_events(ring) >= min_events)
break;
schedule();
ret = wait_event_interruptible(ctx->wait, io_cqring_events(ring) >= min_events);
if (ret == -ERESTARTSYS)
ret = -EINTR;
if (signal_pending(current))
break;
} while (1);
finish_wait(&ctx->wait, &wait);
if (sig)
restore_user_sigmask(sig, &sigsaved);