diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 3e78af2..51b4c43 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -30,6 +30,7 @@
 #include <linux/vfs.h>
 #include <linux/seq_file.h>
 #include <linux/mount.h>
+#include <linux/log2.h>
 #include <asm/uaccess.h>
 #include "ext2.h"
 #include "xattr.h"
@@ -862,7 +863,7 @@
 		sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
 		sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
 		if ((sbi->s_inode_size < EXT2_GOOD_OLD_INODE_SIZE) ||
-		    (sbi->s_inode_size & (sbi->s_inode_size - 1)) ||
+		    !is_power_of_2(sbi->s_inode_size) ||
 		    (sbi->s_inode_size > blocksize)) {
 			printk ("EXT2-fs: unsupported inode size: %d\n",
 				sbi->s_inode_size);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 0e829cc..4c8d31c 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1738,7 +1738,7 @@
 	if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) {
 		if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT ||
 		    sbi->s_desc_size > EXT4_MAX_DESC_SIZE ||
-		    sbi->s_desc_size & (sbi->s_desc_size - 1)) {
+		    !is_power_of_2(sbi->s_desc_size)) {
 			printk(KERN_ERR
 			       "EXT4-fs: unsupported descriptor size %lu\n",
 			       sbi->s_desc_size);