Xiao Guangrong wrote:
Using bitmap_empty() to see whether memslot->dirty_bitmap is empty
You can do this for arch specific get_dirty_log() too.
Signed-off-by: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxx>
---
virt/kvm/kvm_main.c | 6 ++----
1 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index bcd08b8..497ae14 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -767,8 +767,7 @@ int kvm_get_dirty_log(struct kvm *kvm,
struct kvm_dirty_log *log, int *is_dirty)
{
struct kvm_memory_slot *memslot;
- int r, i;
- int n;
+ int r, n;
unsigned long any = 0;
any is no longer need to be unsigned long, if you do this?
r = -EINVAL;
@@ -782,8 +781,7 @@ int kvm_get_dirty_log(struct kvm *kvm,
n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
- for (i = 0; !any && i < n/sizeof(long); ++i)
- any = memslot->dirty_bitmap[i];
+ any = !bitmap_empty(memslot->dirty_bitmap, memslot->npages);
r = -EFAULT;
if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
--
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