It is used to eliminate the overload of function call and cleanup
the code

Signed-off-by: Xiao Guangrong <redacted>
---
 include/linux/kvm_host.h |    9 +++++++--
 virt/kvm/async_pf.c      |    2 +-
 virt/kvm/kvm_main.c      |   13 +------------
 3 files changed, 9 insertions(+), 15 deletions(-)

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 387ecc5..08a9da9 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h

@@ -68,6 +68,13 @@ static inline int is_invalid_pfn(pfn_t pfn)
 	return !is_noslot_pfn(pfn) && is_error_pfn(pfn);
 }

+#define kvm_bad_page	(ERR_PTR(-ENOENT))