arm64: add pmd_[dirty|mkclean] for THP

MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent overwrite
of the contents since MADV_FREE syscall is called for THP page.

This patch adds pmd_dirty and pmd_mkclean for THP page MADV_FREE support.

Signed-off-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 56283f8a675c5f82ac5071fa7863e3d1fce68ed9..bd5db28324badf438795f420b82269fd8083ce63 100644 (file)
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -285,10 +285,12 @@ void pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address,
 
 #define pmd_dirty(pmd)         pte_dirty(pmd_pte(pmd))
 #define pmd_young(pmd)         pte_young(pmd_pte(pmd))
+#define pmd_dirty(pmd)         pte_dirty(pmd_pte(pmd))
 #define pmd_wrprotect(pmd)     pte_pmd(pte_wrprotect(pmd_pte(pmd)))
 #define pmd_mksplitting(pmd)   pte_pmd(pte_mkspecial(pmd_pte(pmd)))
 #define pmd_mkold(pmd)         pte_pmd(pte_mkold(pmd_pte(pmd)))
 #define pmd_mkwrite(pmd)       pte_pmd(pte_mkwrite(pmd_pte(pmd)))
+#define pmd_mkclean(pmd)       pte_pmd(pte_mkclean(pmd_pte(pmd)))
 #define pmd_mkdirty(pmd)       pte_pmd(pte_mkdirty(pmd_pte(pmd)))
 #define pmd_mkyoung(pmd)       pte_pmd(pte_mkyoung(pmd_pte(pmd)))
 #define pmd_mknotpresent(pmd)  (__pmd(pmd_val(pmd) & ~PMD_TYPE_MASK))