The patch titled
is_power_of_2 in fat
has been added to the -mm tree. Its filename is
is_power_of_2-in-fat.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: is_power_of_2 in fat
From: Vignesh Babu BM <vignesh.babu@xxxxxxxxx>
Replacing (n & (n-1)) in the context of power of 2 checks with
is_power_of_2
Signed-off-by: vignesh babu <vignesh.babu@xxxxxxxxx>
Acked-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/fat/inode.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff -puN fs/fat/inode.c~is_power_of_2-in-fat fs/fat/inode.c
--- a/fs/fat/inode.c~is_power_of_2-in-fat
+++ a/fs/fat/inode.c
@@ -25,6 +25,7 @@
#include <linux/parser.h>
#include <linux/uio.h>
#include <linux/writeback.h>
+#include <linux/log2.h>
#include <asm/unaligned.h>
#ifndef CONFIG_FAT_DEFAULT_IOCHARSET
@@ -1217,8 +1218,7 @@ int fat_fill_super(struct super_block *s
}
logical_sector_size =
le16_to_cpu(get_unaligned((__le16 *)&b->sector_size));
- if (!logical_sector_size
- || (logical_sector_size & (logical_sector_size - 1))
+ if (!is_power_of_2(logical_sector_size)
|| (logical_sector_size < 512)
|| (PAGE_CACHE_SIZE < logical_sector_size)) {
if (!silent)
@@ -1228,8 +1228,7 @@ int fat_fill_super(struct super_block *s
goto out_invalid;
}
sbi->sec_per_clus = b->sec_per_clus;
- if (!sbi->sec_per_clus
- || (sbi->sec_per_clus & (sbi->sec_per_clus - 1))) {
+ if (!is_power_of_2(sbi->sec_per_clus)) {
if (!silent)
printk(KERN_ERR "FAT: bogus sectors per cluster %u\n",
sbi->sec_per_clus);
_
Patches currently in -mm which might be from vignesh.babu@xxxxxxxxx are
is_power_of_2-in-fat.patch
-
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