From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: [PATCH AUTOSEL 5.5 488/542] rbd: work around -Wuninitialized warning Date: Fri, 14 Feb 2020 10:48:00 -0500 Message-ID: <20200214154854.6746-488-sashal@kernel.org> References: <20200214154854.6746-1-sashal@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20200214154854.6746-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Arnd Bergmann , Ilya Dryomov , Sasha Levin , ceph-devel@vger.kernel.org, linux-block@vger.kernel.org List-Id: ceph-devel.vger.kernel.org From: Arnd Bergmann [ Upstream commit a55e601b2f02df5db7070e9a37bd655c9c576a52 ] 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 Reviewed-by: Ilya Dryomov Signed-off-by: Ilya Dryomov Signed-off-by: Sasha Levin --- 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 2b184563cd32e..38dcb39051a7f 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2662,7 +2662,7 @@ 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, -- 2.20.1