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| author | vignesh babu <vignesh.babu@wipro.com> | 2007-10-12 16:11:39 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-10-12 16:13:07 +0200 |
| commit | e108cebb21316714de43767e242316c784471740 (patch) | |
| tree | 2f9a761570437a6d7ed05735c0622c9179613548 /drivers/s390/block/dasd_int.h | |
| parent | [S390] qdio: dont cast function pointers and use them to call functions. (diff) | |
| download | linux-e108cebb21316714de43767e242316c784471740.tar.xz linux-e108cebb21316714de43767e242316c784471740.zip | |
[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/block/dasd_int.h')
| -rw-r--r-- | drivers/s390/block/dasd_int.h | 3 |
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; } |