[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <20231221090139.12579-1-dmantipov@yandex.ru>
Date: Thu, 21 Dec 2023 12:01:21 +0300
From: Dmitry Antipov <dmantipov@...dex.ru>
To: David Howells <dhowells@...hat.com>
Cc: Christian Brauner <brauner@...nel.org>,
linux-kernel@...r.kernel.org,
Dmitry Antipov <dmantipov@...dex.ru>
Subject: [PATCH] watch_queue: fix kcalloc() arguments order
When compiling with gcc version 14.0.0 20231220 (experimental)
and W=1, I've noticed the following warning:
kernel/watch_queue.c: In function 'watch_queue_set_size':
kernel/watch_queue.c:273:32: warning: 'kcalloc' sizes specified with 'sizeof'
in the earlier argument and not in the later argument [-Wcalloc-transposed-args]
273 | pages = kcalloc(sizeof(struct page *), nr_pages, GFP_KERNEL);
| ^~~~~~
Since 'n' and 'size' arguments of 'kcalloc()' are multiplied to
calculate the final size, their actual order doesn't affect the
result and so this is not a bug. But it's still worth to fix it.
Signed-off-by: Dmitry Antipov <dmantipov@...dex.ru>
---
kernel/watch_queue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/watch_queue.c b/kernel/watch_queue.c
index 778b4056700f..03b90d7d2175 100644
--- a/kernel/watch_queue.c
+++ b/kernel/watch_queue.c
@@ -270,7 +270,7 @@ long watch_queue_set_size(struct pipe_inode_info *pipe, unsigned int nr_notes)
goto error;
ret = -ENOMEM;
- pages = kcalloc(sizeof(struct page *), nr_pages, GFP_KERNEL);
+ pages = kcalloc(nr_pages, sizeof(struct page *), GFP_KERNEL);
if (!pages)
goto error;
--
2.43.0
Powered by blists - more mailing lists