[PATCH 6.18.y 3/5] io_uring: only call io_should_terminate_tw() once for ctx

[Sasha Levin <sashal@kernel.org>]

From: Caleb Sander Mateos <csander@purestorage.com>

[ Upstream commit 4531d165ee39edb315b42a4a43e29339fa068e51 ]

io_fallback_req_func() calls io_should_terminate_tw() on each req's ctx.
But since the reqs all come from the ctx's fallback_llist, req->ctx will
be ctx for all of the reqs. Therefore, compute ts.cancel as
io_should_terminate_tw(ctx) just once, outside the loop.

Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: 14572de82e50 ("io_uring/waitid: honor task_work cancellation")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 io_uring/io_uring.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index d59a750e5e89c..7c0ef8f04139c 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -292,10 +292,9 @@ static __cold void io_fallback_req_func(struct work_struct *work)
 
 	percpu_ref_get(&ctx->refs);
 	mutex_lock(&ctx->uring_lock);
-	llist_for_each_entry_safe(req, tmp, node, io_task_work.node) {
-		ts.cancel = io_should_terminate_tw(req->ctx);
+	ts.cancel = io_should_terminate_tw(ctx);
+	llist_for_each_entry_safe(req, tmp, node, io_task_work.node)
 		req->io_task_work.func(req, ts);
-	}
 	io_submit_flush_completions(ctx);
 	mutex_unlock(&ctx->uring_lock);
 	percpu_ref_put(&ctx->refs);
-- 
2.53.0