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>
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@ -22,6 +22,7 @@
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#include <linux/mount.h>
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#include <linux/mount.h>
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#include <linux/uio.h>
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#include <linux/uio.h>
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#include <linux/namei.h>
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#include <linux/namei.h>
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#include <linux/log2.h>
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#include <asm/uaccess.h>
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#include <asm/uaccess.h>
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#include "internal.h"
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#include "internal.h"
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@ -67,7 +68,7 @@ static void kill_bdev(struct block_device *bdev)
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int set_blocksize(struct block_device *bdev, int size)
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int set_blocksize(struct block_device *bdev, int size)
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{
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{
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/* Size must be a power of two, and between 512 and PAGE_SIZE */
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/* Size must be a power of two, and between 512 and PAGE_SIZE */
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if (size > PAGE_SIZE || size < 512 || (size & (size-1)))
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if (size > PAGE_SIZE || size < 512 || !is_power_of_2(size))
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return -EINVAL;
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return -EINVAL;
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/* Size cannot be smaller than the size supported by the device */
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/* Size cannot be smaller than the size supported by the device */
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