block: rbd: use NULL instead of 0

The local variables such as 'bio_list', and 'pages' are pointers;
thus, use NULL instead of 0 to fix the following sparse warnings.

drivers/block/rbd.c:2166:32: warning: Using plain integer as NULL pointer
drivers/block/rbd.c:2168:31: warning: Using plain integer as NULL pointer

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Reviewed-by: Sage Weil <sage@inktank.com>

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 4ad2ad9..0d669ae 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -2163,9 +2163,9 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request,
        struct rbd_obj_request *obj_request = NULL;
        struct rbd_obj_request *next_obj_request;
        bool write_request = img_request_write_test(img_request);
-       struct bio *bio_list = 0;
+       struct bio *bio_list = NULL;
        unsigned int bio_offset = 0;
-       struct page **pages = 0;
+       struct page **pages = NULL;
        u64 img_offset;
        u64 resid;
        u16 opcode;