diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index d7cf4495d..0f294ac31 100755
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -61,7 +61,7 @@ struct blk_keyslot_manager;
  */
 #define BLKCG_MAX_POLS		5
 
-static inline int blk_validate_block_size(unsigned long bsize)
+static inline int blk_validate_block_size(unsigned int bsize)
 {
 	if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize))
 		return -EINVAL;