pgtable: add pud_index() fallback

Change-Id: I4ef23d27ca85afc9933cf1dc70b8b605ee4f6591
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 7f9eced..660b70c 100644 (file)
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -1207,4 +1207,12 @@ static inline bool arch_has_pfn_modify_check(void)
 #define pmd_leaf(x)    0
 #endif
 
+#ifndef pud_index
+static inline unsigned long pud_index(unsigned long address)
+{
+       return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1);
+}
+#define pud_index pud_index
+#endif
+
 #endif /* _ASM_GENERIC_PGTABLE_H */