Merge tag 'v3.13-rc6' into for-3.14/core

Needed to bring blk-mq uptodate, since changes have been going in
since for-3.14/core was established.

Fixup merge issues related to the immutable biovec changes.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

Conflicts:
	block/blk-flush.c
	fs/btrfs/check-integrity.c
	fs/btrfs/extent_io.c
	fs/btrfs/scrub.c
	fs/logfs/dev_bdev.c

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/md/bcache/util.h b/drivers/md/bcache/util.h
index 362c4b3f8b4a..1030c6020e98 100644
--- a/drivers/md/bcache/util.h
+++ b/drivers/md/bcache/util.h
@@ -110,7 +110,7 @@ do {									\
         _r;                                                             \
 })
 
-#define heap_peek(h)    ((h)->size ? (h)->data[0] : NULL)
+#define heap_peek(h)    ((h)->used ? (h)->data[0] : NULL)
 
 #define heap_full(h)    ((h)->used == (h)->size)