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

drivers/md/dm-cache-target.c

@@ -2763,7 +2763,7 @@ static int resize_cache_dev(struct cache *cache, dm_cblock_t new_size)
 {
 	int r;
 
-	r = dm_cache_resize(cache->cmd, cache->cache_size);
+	r = dm_cache_resize(cache->cmd, new_size);
 	if (r) {
 		DMERR("could not resize cache metadata");
 		return r;