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rd: use is_power_of_2() in drivers/block/rd.c. 

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Robert P. J. Day 2008-02-06 01:36:51 -08:00 committed by Linus Torvalds
parent 2118116e5e
commit 67a3b2b6ce
1 changed files with 2 additions and 1 deletions
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3
drivers/block/rd.c
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@ -56,6 +56,7 @@
#include <linux/backing-dev.h>
#include <linux/blkpg.h>
#include <linux/writeback.h>
#include <linux/log2.h>
#include <asm/uaccess.h>
@ -450,7 +451,7 @@ static int __init rd_init(void)
err = -ENOMEM;
if (rd_blocksize > PAGE_SIZE || rd_blocksize < 512 ||
(rd_blocksize & (rd_blocksize-1))) {
!is_power_of_2(rd_blocksize)) {
printk("RAMDISK: wrong blocksize %d, reverting to defaults\n",
rd_blocksize);
rd_blocksize = BLOCK_SIZE;