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Commit 1330593e authored by Vignesh Babu's avatar Vignesh Babu Committed by Theodore Ts'o
Browse files

ext4: Use is_power_of_2() 



Replace (n & (n-1)) in the context of power of 2 checks with
is_power_of_2()

Signed-off-by: default avatarVignesh Babu <vignesh.babu@wipro.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarDave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent fc0e15a6

fs/ext4/super.c

+2 −1
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ 
#include <linux/namei.h>

#include <linux/quotaops.h>

#include <linux/seq_file.h>

#include <linux/log2.h>



#include <asm/uaccess.h>
@@ -1644,7 +1645,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) 
		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 < EXT4_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 (KERN_ERR

				"EXT4-fs: unsupported inode size: %d\n",