From: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Date: Thu, 30 Apr 2020 00:47:50 +0000 (-0700)
Subject: io_uring: use proper references for fallback_req locking
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=dd461af65946de060bff2dab08a63676d2731afe;p=linux.git

io_uring: use proper references for fallback_req locking

Use ctx->fallback_req address for test_and_set_bit_lock() and
clear_bit_unlock().

Signed-off-by: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index b536c34c6c369..3da2a02531e68 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1295,7 +1295,7 @@ static struct io_kiocb *io_get_fallback_req(struct io_ring_ctx *ctx)
 	struct io_kiocb *req;
 
 	req = ctx->fallback_req;
-	if (!test_and_set_bit_lock(0, (unsigned long *) ctx->fallback_req))
+	if (!test_and_set_bit_lock(0, (unsigned long *) &ctx->fallback_req))
 		return req;
 
 	return NULL;
@@ -1382,7 +1382,7 @@ static void __io_free_req(struct io_kiocb *req)
 	if (likely(!io_is_fallback_req(req)))
 		kmem_cache_free(req_cachep, req);
 	else
-		clear_bit_unlock(0, (unsigned long *) req->ctx->fallback_req);
+		clear_bit_unlock(0, (unsigned long *) &req->ctx->fallback_req);
 }
 
 struct req_batch {