Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e7d709c096487078652a1384d7a2d0e4459e18b6
Commit: e7d709c096487078652a1384d7a2d0e4459e18b6
Parent: 4fa156ea846daae44d60b05ea066d0e28fd3b6c4
Author: Vignesh Babu BM <[EMAIL PROTECTED]>
AuthorDate: Tue May 8 00:24:27 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue May 8 11:14:59 2007 -0700
is_power_of_2 in fat
Replacing (n & (n-1)) in the context of power of 2 checks with
is_power_of_2
Signed-off-by: vignesh babu <[EMAIL PROTECTED]>
Acked-by: OGAWA Hirofumi <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
fs/fat/inode.c | 7 +++----
1 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 65cb54b..a8129e8 100644
--- a/fs/fat/inode.c
+++ b/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 *sb, void *data,
int silent,
}
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 *sb, void *data,
int silent,
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);
-
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