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authorvignesh babu <vignesh.babu@wipro.com>2007-10-12 16:11:39 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-10-12 16:13:07 +0200
commite108cebb21316714de43767e242316c784471740 (patch)
tree2f9a761570437a6d7ed05735c0622c9179613548 /drivers/s390
parentb18a2db416088ad54a4bfb59c0b932be383aee83 (diff)
downloadlinux-e108cebb21316714de43767e242316c784471740.tar.bz2
[S390] is_power_of_2 in drivers/s390/block/dasd_int.h
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>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/block/dasd_int.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index aeda52682446..d427daeef511 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -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;
}