From: Jens Freimann Date: Tue, 18 Mar 2014 15:34:18 +0000 (+0100) Subject: KVM: s390: fix calculation of idle_mask array size X-Git-Tag: v3.15-rc1~118^2~3^2~2 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=609433fbed4f25e11e8b058ab7e9478b212879a9;p=karo-tx-linux.git KVM: s390: fix calculation of idle_mask array size 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 Reviewed-by: Cornelia Huck Signed-off-by: Christian Borntraeger --- diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 734d302ba389..c36cd35e03f3 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -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; };