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is_power_of_2 in fs/hfs

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

Signed-off-by: vignesh babu <[email protected]>
Cc: Roman Zippel <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Vignesh Babu BM 2007-05-08 00:24:30 -07:00 • committed by Linus Torvalds
commit e1b5c1d3da
2 changed files with 4 additions and 2 deletions
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3
fs/hfsplus/btree.c
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@ -10,6 +10,7 @@
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/log2.h>
#include "hfsplus_fs.h"
#include "hfsplus_raw.h"
@ -69,7 +70,7 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id)
}
size = tree->node_size;
if (!size || size & (size - 1))
if (!is_power_of_2(size))
goto fail_page;
if (!tree->node_count)
goto fail_page;