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io_uring: remove REQ_F_IO_DRAINED

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A request can get into the defer list only once, there is no need for
marking it as drained, so remove it. This probably was left after
extracting __need_defer() for use in timeouts.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2020-01-18 01:22:30 +03:00 committed by Jens Axboe
parent e46a7950d3
commit 87987898a1
1 changed files with 2 additions and 5 deletions
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7
fs/io_uring.c
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@ -499,7 +499,6 @@ struct io_kiocb {
#define REQ_F_FIXED_FILE 4 /* ctx owns file */
#define REQ_F_LINK_NEXT 8 /* already grabbed next link */
#define REQ_F_IO_DRAIN 16 /* drain existing IO first */
#define REQ_F_IO_DRAINED 32 /* drain done */
#define REQ_F_LINK 64 /* linked sqes */
#define REQ_F_LINK_TIMEOUT 128 /* has linked timeout */
#define REQ_F_FAIL_LINK 256 /* fail rest of links */
@ -817,7 +816,7 @@ static inline bool __req_need_defer(struct io_kiocb *req)
static inline bool req_need_defer(struct io_kiocb *req)
{
if ((req->flags & (REQ_F_IO_DRAIN|REQ_F_IO_DRAINED)) == REQ_F_IO_DRAIN)
if (unlikely(req->flags & REQ_F_IO_DRAIN))
return __req_need_defer(req);
return false;
@ -939,10 +938,8 @@ static void io_commit_cqring(struct io_ring_ctx *ctx)
__io_commit_cqring(ctx);
while ((req = io_get_deferred_req(ctx)) != NULL) {
req->flags |= REQ_F_IO_DRAINED;
while ((req = io_get_deferred_req(ctx)) != NULL)
io_queue_async_work(req);
}
}
static struct io_uring_cqe *io_get_cqring(struct io_ring_ctx *ctx)