include/linux/bio.h: use a static inline function for bio_integrity_clone()

When CONFIG_BLK_DEV_INTEGRITY is not set, we get these warnings:

drivers/md/dm.c: In function 'split_bvec':
drivers/md/dm.c:1061:3: warning: statement with no effect
drivers/md/dm.c: In function 'clone_bio':
drivers/md/dm.c:1088:3: warning: statement with no effect

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/include/linux/bio.h b/include/linux/bio.h
index a3c071c9e18934765e44b84d8330e9fd979d6dc4..d2a3cc23d8283fe1ce7763de5d5edd793d7837c1 100644 (file)
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -519,7 +519,11 @@ extern void bio_integrity_init(void);
 #define bioset_integrity_create(a, b)  (0)
 #define bio_integrity_prep(a)          (0)
 #define bio_integrity_enabled(a)       (0)
-#define bio_integrity_clone(a, b, c, d)        (0)
+static inline int bio_integrity_clone(struct bio *bio, struct bio *bio_src,
+                                     gfp_t gfp_mask, struct bio_set *bs)
+{
+       return 0;
+}
 #define bioset_integrity_free(a)       do { } while (0)
 #define bio_integrity_free(a, b)       do { } while (0)
 #define bio_integrity_endio(a, b)      do { } while (0)