Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d8ea6cf89991000ae458e34e36379814cf202555
Commit:     d8ea6cf89991000ae458e34e36379814cf202555
Parent:     3befe7ceb8d39a56a9ea55dd2da8b4bd9ddcdd36
Author:     vignesh babu <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 16 23:27:14 2007 -0700
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed Oct 17 08:42:53 2007 -0700

    ext2/4: use is_power_of_2()
    
    Replace n & (n - 1) with is_power_of_2(n)
    
    Signed-off-by: vignesh babu <[EMAIL PROTECTED]>
    Cc: <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 fs/ext2/super.c |    3 ++-
 fs/ext4/super.c |    2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

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 @@ static int ext2_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 < 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 @@ 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);
-
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