@@ -866,6 +866,13 @@ static inline bool pte_ci(pte_t pte)
static inline void pmd_clear(pmd_t *pmdp)
{
+ if (IS_ENABLED(CONFIG_DEBUG_VM) && !radix_enabled()) {
+ /*
+ * Don't use this if we can possibly have a hash page table
+ * entry mapping this.
+ */
+ WARN_ON((pmd_val(*pmdp) & (H_PAGE_HASHPTE | _PAGE_PTE)) == (H_PAGE_HASHPTE | _PAGE_PTE));
+ }
*pmdp = __pmd(0);
}
@@ -914,6 +921,13 @@ static inline int pmd_bad(pmd_t pmd)
static inline void pud_clear(pud_t *pudp)
{
+ if (IS_ENABLED(CONFIG_DEBUG_VM) && !radix_enabled()) {
+ /*
+ * Don't use this if we can possibly have a hash page table
+ * entry mapping this.
+ */
+ WARN_ON((pud_val(*pudp) & (H_PAGE_HASHPTE | _PAGE_PTE)) == (H_PAGE_HASHPTE | _PAGE_PTE));
+ }
*pudp = __pud(0);
}