Commit b7fff536 authored Jan 30, 2008 by Ingo Molnar

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>

parent 38472311

include/asm-x86/page.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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))