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KVM: s390: fix calculation of idle_mask array size

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We need BITS_TO_LONGS, not sizeof(long) to calculate
the correct size.

idle_mask is a bitmask, each bit representing the state
of a cpu. The desired outcome is an array of unsigned long
fields that can fit KVM_MAX_VCPUS bits. We should not use
sizeof(long) which returnes the size in bytes, but BITS_TO_LONGS

Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Jens Freimann 2014-03-18 16:34:18 +01:00 committed by Christian Borntraeger
parent f6c137ff00
commit 609433fbed
1 changed files with 1 additions and 2 deletions
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3
arch/s390/include/asm/kvm_host.h
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@ -213,8 +213,7 @@ struct kvm_s390_float_interrupt {
struct list_head list;
atomic_t active;
int next_rr_cpu;
unsigned long idle_mask[(KVM_MAX_VCPUS + sizeof(long) - 1)
/ sizeof(long)];
unsigned long idle_mask[BITS_TO_LONGS(KVM_MAX_VCPUS)];
unsigned int irq_count;
};