From: Arnd Bergmann <arnd@arndb.de>
To: Ilya Dryomov <idryomov@gmail.com>, Sage Weil <sage@redhat.com>,
Jens Axboe <axboe@kernel.dk>
Cc: Oleksandr Natalenko <oleksandr@redhat.com>,
Arnd Bergmann <arnd@arndb.de>,
Dongsheng Yang <dongsheng.yang@easystack.cn>,
Jason Dillaman <dillaman@redhat.com>,
David Howells <dhowells@redhat.com>,
ceph-devel@vger.kernel.org, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] rbd: work around -Wuninitialized warning
Date: Tue, 7 Jan 2020 22:01:04 +0100 [thread overview]
Message-ID: <20200107210256.2426176-1-arnd@arndb.de> (raw)
gcc -O3 warns about a dummy variable that is passed
down into rbd_img_fill_nodata without being initialized:
drivers/block/rbd.c: In function 'rbd_img_fill_nodata':
drivers/block/rbd.c:2573:13: error: 'dummy' is used uninitialized in this function [-Werror=uninitialized]
fctx->iter = *fctx->pos;
Since this is a dummy, I assume the warning is harmless, but
it's better to initialize it anyway and avoid the warning.
Fixes: mmtom ("init/Kconfig: enable -O3 for all arches")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/block/rbd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 29be02838b67..070edc5983df 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -2664,7 +2664,7 @@ static int rbd_img_fill_nodata(struct rbd_img_request *img_req,
u64 off, u64 len)
{
struct ceph_file_extent ex = { off, len };
- union rbd_img_fill_iter dummy;
+ union rbd_img_fill_iter dummy = {};
struct rbd_img_fill_ctx fctx = {
.pos_type = OBJ_REQUEST_NODATA,
.pos = &dummy,
--
2.20.0
next reply other threads:[~2020-01-07 21:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-07 21:01 Arnd Bergmann [this message]
2020-01-08 15:31 ` [PATCH] rbd: work around -Wuninitialized warning Ilya Dryomov
2020-01-08 16:05 ` Arnd Bergmann
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