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| author | Vignesh Babu BM <vignesh.babu@wipro.com> | 2007-05-08 00:24:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:14:59 -0700 |
| commit | 1368c4f2482c9e06bcb297217433818b171cc9e3 (patch) | |
| tree | 0b9da8f7841e370cb44de9504843591a223b8c1d /fs | |
| parent | e1b5c1d3da05c91129120d045dfcdfc7761f44f1 (diff) | |
| download | lwn-1368c4f2482c9e06bcb297217433818b171cc9e3.tar.gz lwn-1368c4f2482c9e06bcb297217433818b171cc9e3.zip | |
is_power_of_2 in fs/block_dev.c
Replace (n & (n-1)) in the context of power of 2 checks with is_power_of_2
Signed-off-by: vignesh babu <vignesh.babu@wipro.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/block_dev.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index f02b7bdd9864..742899240872 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -22,6 +22,7 @@ #include <linux/mount.h> #include <linux/uio.h> #include <linux/namei.h> +#include <linux/log2.h> #include <asm/uaccess.h> #include "internal.h" @@ -67,7 +68,7 @@ static void kill_bdev(struct block_device *bdev) int set_blocksize(struct block_device *bdev, int size) { /* Size must be a power of two, and between 512 and PAGE_SIZE */ - if (size > PAGE_SIZE || size < 512 || (size & (size-1))) + if (size > PAGE_SIZE || size < 512 || !is_power_of_2(size)) return -EINVAL; /* Size cannot be smaller than the size supported by the device */ |