currently, if the page is not a tail of compound page, it will be
checked twice for the same thing.
Signed-off-by: Ben Luo <luo...@linux.alibaba.com>
---
drivers/vfio/vfio_iommu_type1.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 054391f..d0f7346 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -291,11 +291,10 @@ static int vfio_lock_acct(struct vfio_dma *dma, long
npage, bool async)
static bool is_invalid_reserved_pfn(unsigned long pfn)
{
if (pfn_valid(pfn)) {
- bool reserved;
struct page *tail = pfn_to_page(pfn);
struct page *head = compound_head(tail);
- reserved = !!(PageReserved(head));
if (head != tail) {
+ bool reserved = PageReserved(head);
/*
* "head" is not a dangling pointer
* (compound_head takes care of that)
--
1.8.3.1
