free_page() is not needed to be protected by page table lock,
and it will take a little longer, so move it out of the spinlock.
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
---
mm/kasan/shadow.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c
index fd15e38ff80e..d7d6724da2e0 100644
--- a/mm/kasan/shadow.c
+++ b/mm/kasan/shadow.c
@@ -423,12 +423,13 @@ static int kasan_depopulate_vmalloc_pte(pte_t *ptep, unsigned long addr,
page = (unsigned long)__va(pte_pfn(ptep_get(ptep)) << PAGE_SHIFT);
spin_lock(&init_mm.page_table_lock);
-
- if (likely(!pte_none(ptep_get(ptep)))) {
+ if (likely(!pte_none(ptep_get(ptep))))
pte_clear(&init_mm, addr, ptep);
- free_page(page);
- }
+ else
+ page = 0;
spin_unlock(&init_mm.page_table_lock);
+ if (page)
+ free_page(page);
return 0;
}
--
2.41.0
