Commit e1b5c1d3 authored by Vignesh Babu BM's avatar Vignesh Babu BM Committed by Linus Torvalds
Browse files

is_power_of_2 in fs/hfs 



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

Signed-off-by: default avatarvignesh babu <vignesh.babu@wipro.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e7d709c0

fs/hfs/btree.c

+2 −1
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ 
 */



#include <linux/pagemap.h>

#include <linux/log2.h>



#include "btree.h"
@@ -76,7 +77,7 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke 
	tree->depth = be16_to_cpu(head->depth);



	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;

fs/hfsplus/btree.c

+2 −1
Original line number Diff line number Diff line
@@ -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;

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