#define pte_mk_savedwrite pte_mkwrite
#endif
+#ifndef pte_clear_savedwrite
+#define pte_clear_savedwrite pte_wrprotect
+#endif
+
#ifndef pmd_savedwrite
#define pmd_savedwrite pmd_write
#endif
#define pmd_mk_savedwrite pmd_mkwrite
#endif
+#ifndef pmd_clear_savedwrite
+#define pmd_clear_savedwrite pmd_wrprotect
+#endif
+
#ifndef __HAVE_ARCH_PMDP_SET_WRPROTECT
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static inline void pmdp_set_wrprotect(struct mm_struct *mm,
if (!ptep)
goto out_mn;
- if (pte_write(*ptep) || pte_dirty(*ptep)) {
+ if (pte_write(*ptep) || pte_dirty(*ptep) ||
+ (pte_protnone(*ptep) && pte_savedwrite(*ptep))) {
pte_t entry;
swapped = PageSwapCache(page);
}
if (pte_dirty(entry))
set_page_dirty(page);
- entry = pte_mkclean(pte_wrprotect(entry));
+
+ if (pte_protnone(entry))
+ entry = pte_mkclean(pte_clear_savedwrite(entry));
+ else
+ entry = pte_mkclean(pte_wrprotect(entry));
set_pte_at_notify(mm, addr, ptep, entry);
}
*orig_pte = *ptep;