x86: unify pgd_bad

Impact: cleanup

Unify and demacro pgd_bad.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 0c734e2a90ca..ebcb60e6a961 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -574,6 +574,11 @@ static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address)
 {
         return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address);
 }
+
+static inline int pgd_bad(pgd_t pgd)
+{
+        return (pgd_val(pgd) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE;
+}
 #endif  /* PAGETABLE_LEVELS > 3 */
 
 #endif  /* __ASSEMBLY__ */