The flush_cache_page() only remove a PAGE_SIZE sized range from the cache.
However, it does not cover the full pages in a THP except a head page.
Replace it with flush_cache_range() to fix this issue. At least, no
problems were found due to this. Maybe because the architectures that
have virtual indexed caches is less.

Fixes: f27176cfc363 ("mm: convert page_mkclean_one() to use 
Signed-off-by: Muchun Song <>
 mm/rmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/rmap.c b/mm/rmap.c
index b0fd9dc19eba..65670cb805d6 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -974,7 +974,7 @@ static bool page_mkclean_one(struct page *page, struct 
vm_area_struct *vma,
                        if (!pmd_dirty(*pmd) && !pmd_write(*pmd))
-                       flush_cache_page(vma, address, page_to_pfn(page));
+                       flush_cache_range(vma, address, address + 
                        entry = pmdp_invalidate(vma, address, pmd);
                        entry = pmd_wrprotect(entry);
                        entry = pmd_mkclean(entry);

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