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rbd: work around -Wuninitialized warning

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[ Upstream commit a55e601b2f ]

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>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Arnd Bergmann
2020-01-07 22:01:04 +01:00
committed by Greg Kroah-Hartman
parent bd4e189416
commit 1687b204ae
1 changed files with 1 additions and 1 deletions
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2
drivers/block/rbd.c
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@@ -2739,7 +2739,7 @@ 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,