x86: fix pte_modify() bug
fix sign extension bug in PTE_MASK / _PTE_CHG_MASK.
this resolves the following bootup crash on PAE systems:
[ 94.710726] init[1]: segfault at 00000004 ip 49471cbb sp bff0c6c0 error 4
[ 94.717764] init[1]: segfault at 00000004 ip 49471cbb sp bff0c6c0 error 4
[ 94.724772] init[1]: segfault at 00000004 ip 49471cbb sp bff0c6c0 error 4
[ 94.731777] init[1]: segfault at 00000004 ip 49471cbb sp bff0c6c0 error 4
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h
index 3a00d0d..9192056 100644
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -11,7 +11,7 @@
#ifdef __KERNEL__
#define PHYSICAL_PAGE_MASK (PAGE_MASK & __PHYSICAL_MASK)
-#define PTE_MASK PHYSICAL_PAGE_MASK
+#define PTE_MASK (_AT(long, PHYSICAL_PAGE_MASK))
#define LARGE_PAGE_SIZE (_AC(1,UL) << PMD_SHIFT)
#define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))