[PATCH AUTOSEL for 4.4 141/162] asm-generic: provide generic_pmdp_establish()

From: "Kirill A. Shutemov" [ Upstream commit c58f0bb77ed8bf93dfdde762b01cb67eebbdfc29 ] Patch series "Do not lose dirty bit on THP pages", v4. Vlastimil noted that pmdp_invalidate() is not atomic and we can lose dirty and access bits if CPU sets them after pmdp

[PATCH AUTOSEL for 4.4 141/162] asm-generic: provide generic_pmdp_establish()

From: "Kirill A. Shutemov" [ Upstream commit c58f0bb77ed8bf93dfdde762b01cb67eebbdfc29 ] Patch series "Do not lose dirty bit on THP pages", v4. Vlastimil noted that pmdp_invalidate() is not atomic and we can lose dirty and access bits if CPU sets them after pmdp dereference, but before