1 files changed, 2 insertions, 0 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 3d85bbb09f1b..9b179163f1de 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1819,6 +1819,8 @@ static inline void set_bitmap_uptodate(struct buffer_head *bh)
         set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state);
 }
 
+#define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1)
+
 #endif  /* __KERNEL__ */
 
 #endif  /* _EXT4_H */