{
pmd_t pmdval = pmdp_get_lockless(pmd);
- if (!pmd_trans_unstable(&pmdval))
- return 0;
-
- if (pmd_none(pmdval)) {
- walk->action = ACTION_AGAIN;
- return 0;
- }
-
- /* Huge pmd, present or migrated */
- walk->action = ACTION_CONTINUE;
- if (pmd_trans_huge(pmdval) || pmd_devmap(pmdval))
+ /* Do not split a huge pmd, present or migrated */
+ if (pmd_trans_huge(pmdval) || pmd_devmap(pmdval)) {
WARN_ON(pmd_write(pmdval) || pmd_dirty(pmdval));
-
+ walk->action = ACTION_CONTINUE;
+ }
return 0;
}
static int wp_clean_pud_entry(pud_t *pud, unsigned long addr, unsigned long end,
struct mm_walk *walk)
{
+#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
pud_t pudval = READ_ONCE(*pud);
- if (!pud_trans_unstable(&pudval))
- return 0;
-
- if (pud_none(pudval)) {
- walk->action = ACTION_AGAIN;
- return 0;
- }
-
-#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
- /* Huge pud */
- walk->action = ACTION_CONTINUE;
- if (pud_trans_huge(pudval) || pud_devmap(pudval))
+ /* Do not split a huge pud */
+ if (pud_trans_huge(pudval) || pud_devmap(pudval)) {
WARN_ON(pud_write(pudval) || pud_dirty(pudval));
+ walk->action = ACTION_CONTINUE;
+ }
#endif
-
return 0;
}