[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>
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@ -53,6 +53,7 @@
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#include <linux/genhd.h>
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#include <linux/hdreg.h>
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#include <linux/interrupt.h>
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#include <linux/log2.h>
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#include <asm/ccwdev.h>
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#include <linux/workqueue.h>
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#include <asm/debug.h>
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@ -456,7 +457,7 @@ dasd_free_chunk(struct list_head *chunk_list, void *mem)
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static inline int
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dasd_check_blocksize(int bsize)
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{
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if (bsize < 512 || bsize > 4096 || (bsize & (bsize - 1)) != 0)
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if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
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return -EMEDIUMTYPE;
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return 0;
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}
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