From: Izik Eidus <[email protected]>
Use kvm_write_guest_page() with empty_zero_page, instead of doing
kmap and memset.
Signed-off-by: Izik Eidus <[email protected]>
Signed-off-by: Avi Kivity <[email protected]>
---
drivers/kvm/kvm_main.c | 17 +----------------
1 files changed, 1 insertions(+), 16 deletions(-)
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index f9fd865..469e6b4 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -633,22 +633,7 @@ int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
{
- void *page_virt;
- struct page *page;
-
- page = gfn_to_page(kvm, gfn);
- if (is_error_page(page)) {
- kvm_release_page(page);
- return -EFAULT;
- }
- page_virt = kmap_atomic(page, KM_USER0);
-
- memset(page_virt + offset, 0, len);
-
- kunmap_atomic(page_virt, KM_USER0);
- kvm_release_page(page);
- mark_page_dirty(kvm, gfn);
- return 0;
+ return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len);
}
EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
--
1.5.3.7
--
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