[PATCH for-next 3/4] io_uring: ease timeout flush locking requirements

[Pavel Begunkov <asml.silence@gmail.com>]

We don't need completion_lock for timeout flushing, don't take it.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 io_uring/io_uring.c | 9 ++++-----
 io_uring/timeout.c  | 2 --
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 57c1c0da7648..4593016c6e37 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -570,12 +570,11 @@ static void io_eventfd_flush_signal(struct io_ring_ctx *ctx)
 
 void __io_commit_cqring_flush(struct io_ring_ctx *ctx)
 {
-	if (ctx->off_timeout_used || ctx->drain_active) {
+	if (ctx->off_timeout_used)
+		io_flush_timeouts(ctx);
+	if (ctx->drain_active) {
 		spin_lock(&ctx->completion_lock);
-		if (ctx->off_timeout_used)
-			io_flush_timeouts(ctx);
-		if (ctx->drain_active)
-			io_queue_deferred(ctx);
+		io_queue_deferred(ctx);
 		spin_unlock(&ctx->completion_lock);
 	}
 	if (ctx->has_evfd)
diff --git a/io_uring/timeout.c b/io_uring/timeout.c
index eae005b2d1d2..826a51bca3e4 100644
--- a/io_uring/timeout.c
+++ b/io_uring/timeout.c
@@ -50,7 +50,6 @@ static inline void io_put_req(struct io_kiocb *req)
 }
 
 static bool io_kill_timeout(struct io_kiocb *req, int status)
-	__must_hold(&req->ctx->completion_lock)
 	__must_hold(&req->ctx->timeout_lock)
 {
 	struct io_timeout_data *io = req->async_data;
@@ -70,7 +69,6 @@ static bool io_kill_timeout(struct io_kiocb *req, int status)
 }
 
 __cold void io_flush_timeouts(struct io_ring_ctx *ctx)
-	__must_hold(&ctx->completion_lock)
 {
 	u32 seq;
 	struct io_timeout *timeout, *tmp;
-- 
2.38.1