x86: unify pmd_none
Impact: cleanup
Unify and demacro pmd_none.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 147d3f0..2f38bbe 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -450,6 +450,13 @@
return pmd_val(pmd) & _PAGE_PRESENT;
}
+static inline int pmd_none(pmd_t pmd)
+{
+ /* Only check low word on 32-bit platforms, since it might be
+ out of sync with upper half. */
+ return !(unsigned long)native_pmd_val(pmd);
+}
+
#if PAGETABLE_LEVELS > 2
static inline int pud_present(pud_t pud)
{