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is_power_of_2-hfs/mdb.c

PATCH New vignesh babu 1 participant 1 message Jun 13, 2007

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vignesh babu

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PATCH 1/1 is_power_of_2-hfs/mdb.c

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

Signed-off-by vignesh babu <[email protected]>

---

fs/hfs/mdb.c +2 -1
index b4651e1..8bda11d 100644
@@ -11,6 +11,7 @@
 #include <linux/cdrom.h>
 #include <linux/genhd.h>
 #include <linux/nls.h>
+#include <linux/log2.h>
 
 #include "hfs_fs.h"
 #include "btree.h"

@@ -106,7 +107,7 @@ int hfs_mdb_get(struct super_block *sb)
 
 	size = min(HFS_SB(sb)->alloc_blksz, (u32)PAGE_SIZE);
 	/* size must be a multiple of 512 */
-	while (size & (size - 1))
+	while (!is_power_of_2(size))
 		size -= HFS_SECTOR_SIZE;
 	sect = be16_to_cpu(mdb->drAlBlSt) + part_start;
 	/* align block size to first sector */
Signature · 3 lines
Vignesh Babu BM 
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"Why is it that every time I'm with you, makes me believe in magic?"