The patch titled
ext2/4: use is_power_of_2()
has been added to the -mm tree. Its filename is
ext2-4-use-is_power_of_2.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: ext2/4: use is_power_of_2()
From: vignesh babu <[email protected]>
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]>
---
fs/ext2/super.c | 3 ++-
fs/ext4/super.c | 2 +-
2 files changed, 3 insertions(+), 2 deletions(-)
diff -puN fs/ext2/super.c~ext2-4-use-is_power_of_2 fs/ext2/super.c
--- a/fs/ext2/super.c~ext2-4-use-is_power_of_2
+++ a/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"
@@ -804,7 +805,7 @@ static int ext2_fill_super(struct super_
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 -puN fs/ext4/super.c~ext2-4-use-is_power_of_2 fs/ext4/super.c
--- a/fs/ext4/super.c~ext2-4-use-is_power_of_2
+++ a/fs/ext4/super.c
@@ -1667,7 +1667,7 @@ static int ext4_fill_super (struct super
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);
_
Patches currently in -mm which might be from [email protected] are
git-xfs.patch
ext2-4-use-is_power_of_2.patch