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KVM: Fix dirty page log bitmap size/access calculation
author
Uri Lublin
<uril@qumranet.com>
Thu, 22 Feb 2007 14:43:09 +0000
(16:43 +0200)
committer
Avi Kivity
<avi@qumranet.com>
Sun, 4 Mar 2007 09:12:42 +0000
(11:12 +0200)
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>
drivers/kvm/kvm_main.c
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diff --git
a/drivers/kvm/kvm_main.c
b/drivers/kvm/kvm_main.c
index edff4055b32bd75f15230b3b764a31374775f9a7..e7108105c50bfa8ecc6d8a76f127c0e3cae47319 100644
(file)
--- a/
drivers/kvm/kvm_main.c
+++ b/
drivers/kvm/kvm_main.c
@@
-792,9
+792,9
@@
static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
if (!memslot->dirty_bitmap)
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];
r = -EFAULT;