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KVM: Fix dirty page log bitmap size/access calculation 

Since dirty_bitmap is an unsigned long array, the alignment and size need
to take that into account.

Signed-off-by: Uri Lublin <uril@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Uri Lublin 2007-02-22 16:43:09 +02:00 committed by Avi Kivity
parent ab51a434c5
commit cd1a4a982a
1 changed files with 2 additions and 2 deletions
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4
drivers/kvm/kvm_main.c
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@ -792,9 +792,9 @@ static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
if (!memslot->dirty_bitmap) if (!memslot->dirty_bitmap)
goto out; goto out;
n = ALIGN(memslot->npages, 8) / 8; n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
for (i = 0; !any && i < n; ++i) for (i = 0; !any && i < n/sizeof(long); ++i)
any = memslot->dirty_bitmap[i]; any = memslot->dirty_bitmap[i];
r = -EFAULT; r = -EFAULT;