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>
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@ -56,6 +56,7 @@
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#include <linux/backing-dev.h>
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#include <linux/blkpg.h>
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#include <linux/writeback.h>
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#include <linux/log2.h>
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#include <asm/uaccess.h>
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@ -450,7 +451,7 @@ static int __init rd_init(void)
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err = -ENOMEM;
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if (rd_blocksize > PAGE_SIZE || rd_blocksize < 512 ||
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(rd_blocksize & (rd_blocksize-1))) {
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!is_power_of_2(rd_blocksize)) {
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printk("RAMDISK: wrong blocksize %d, reverting to defaults\n",
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rd_blocksize);
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rd_blocksize = BLOCK_SIZE;
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