1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index e42b8943cb1a..63c2552b6b65 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -1109,6 +1109,21 @@ static inline int pud_write(pud_t pud)
 	return pud_flags(pud) & _PAGE_RW;
 }
 
+#ifndef pmdp_establish
+#define pmdp_establish pmdp_establish
+static inline pmd_t pmdp_establish(struct vm_area_struct *vma,
+		unsigned long address, pmd_t *pmdp, pmd_t pmd)
+{
+	if (IS_ENABLED(CONFIG_SMP)) {
+		return xchg(pmdp, pmd);
+	} else {
+		pmd_t old = *pmdp;
+		*pmdp = pmd;
+		return old;
+	}
+}
+#endif
+
 /*
  * clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
  *