[PATCH v12 24/84] KVM: Use plain "struct page" pointer instead of single-entry array

Sean Christopherson
2024-07-27T00:02:58Z

Use a single pointer instead of a single-entry array for the struct page
pointer in hva_to_pfn_fast(). Using an array makes the code unnecessarily
annoying to read and update.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
virt/kvm/kvm_main.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 3d717a131906..8e83d3f043f1 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2763,7 +2763,7 @@ static inline int check_user_page_hwpoison(unsigned long addr)
*/
static bool hva_to_pfn_fast(struct kvm_follow_pfn *kfp, kvm_pfn_t *pfn)
{
- struct page *page[1];
+ struct page *page;

/*
* Fast pin a writable pfn only if it is a write fault request
@@ -2773,8 +2773,8 @@ static bool hva_to_pfn_fast(struct kvm_follow_pfn *kfp, kvm_pfn_t *pfn)
if (!((kfp->flags & FOLL_WRITE) || kfp->map_writable))
return false;

- if (get_user_page_fast_only(kfp->hva, FOLL_WRITE, page)) {
- *pfn = page_to_pfn(page[0]);
+ if (get_user_page_fast_only(kfp->hva, FOLL_WRITE, &page)) {
+ *pfn = page_to_pfn(page);
if (kfp->map_writable)
*kfp->map_writable = true;
return true;