ext2/4: use is_power_of_2()

Replace n & (n - 1) with is_power_of_2(n)

Signed-off-by: vignesh babu <vignesh.babu@wipro.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 0e829cc8a18a..4c8d31c61454 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1738,7 +1738,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
         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);