AcoSail/kernel_optimize_test
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[S390] is_power_of_2 in drivers/s390/block/dasd_int.h

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Replacing n & (n - 1) for power of 2 check by is_power_of_2(n)

Signed-off-by: vignesh babu <vignesh.babu@wipro.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
vignesh babu 2007-10-12 16:11:39 +02:00 committed by Martin Schwidefsky
parent b18a2db416
commit e108cebb21
1 changed files with 2 additions and 1 deletions
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drivers/s390/block/dasd_int.h
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@ -53,6 +53,7 @@
#include <linux/genhd.h>
#include <linux/hdreg.h>
#include <linux/interrupt.h>
#include <linux/log2.h>
#include <asm/ccwdev.h>
#include <linux/workqueue.h>
#include <asm/debug.h>
@ -456,7 +457,7 @@ dasd_free_chunk(struct list_head *chunk_list, void *mem)
static inline int
dasd_check_blocksize(int bsize)
{
if (bsize < 512 || bsize > 4096 || (bsize & (bsize - 1)) != 0)
if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
return -EMEDIUMTYPE;
return 0;
}