diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index d7518e2728f1..793d44b84d7f 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4011,13 +4011,14 @@ make_io:
 		if (EXT4_SB(sb)->s_inode_readahead_blks) {
 			ext4_fsblk_t b, end, table;
 			unsigned num;
+			__u32 ra_blks = EXT4_SB(sb)->s_inode_readahead_blks;
 
 			table = ext4_inode_table(sb, gdp);
 			/* s_inode_readahead_blks is always a power of 2 */
-			b = block & ~(EXT4_SB(sb)->s_inode_readahead_blks-1);
+			b = block & ~((ext4_fsblk_t) ra_blks - 1);
 			if (table > b)
 				b = table;
-			end = b + EXT4_SB(sb)->s_inode_readahead_blks;
+			end = b + ra_blks;
 			num = EXT4_INODES_PER_GROUP(sb);
 			if (ext4_has_group_desc_csum(sb))
 				num -= ext4_itable_unused_count(sb, gdp);