When pagetable lock is held, the page will always be page_mapped(). So
remove unneeded page_mapped() check. Also the page can't be freed from
under us in this case. So use get_page() to get extra page reference to
simplify the code. No functional change intended.
Signed-off-by: Miaohe Lin <[email protected]>
---
mm/memcontrol.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 284396ea8a33..60b5ff3b4a52 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5649,7 +5649,7 @@ static struct page *mc_handle_present_pte(struct vm_area_struct *vma,
{
struct page *page = vm_normal_page(vma, addr, ptent);
- if (!page || !page_mapped(page))
+ if (!page)
return NULL;
if (PageAnon(page)) {
if (!(mc.flags & MOVE_ANON))
@@ -5658,8 +5658,7 @@ static struct page *mc_handle_present_pte(struct vm_area_struct *vma,
if (!(mc.flags & MOVE_FILE))
return NULL;
}
- if (!get_page_unless_zero(page))
- return NULL;
+ get_page(page);
return page;
}
--
2.33.0