From 1368c4f2482c9e06bcb297217433818b171cc9e3 Mon Sep 17 00:00:00 2001 From: Vignesh Babu BM Date: Tue, 8 May 2007 00:24:32 -0700 Subject: [PATCH] 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/block_dev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index f02b7bd..7428992 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #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 */ -- 2.7.4