c45adb520392fc82ffd647c8c9ba57bbf89c7ca2
diff --git a/include/asm-x86_64/pgtable.h b/include/asm-x86_64/pgtable.h
--- a/include/asm-x86_64/pgtable.h
+++ b/include/asm-x86_64/pgtable.h
@@ -384,7 +384,7 @@ extern inline pte_t pte_modify(pte_t pte
}
#define pte_index(address) \
- ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
+ (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
#define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_kernel(*(dir)) + \
pte_index(address))