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SubjectRe: [PATCH][2.6-mm] Fix 4G/4G X11/vm86 oops
On Sat, 15 Nov 2003, Zwane Mwaikambo wrote:

> The 4G/4G page fault handling path doesn't appear to handle faults
> happening whilst in vm86. The regs->xcs != __USER_CS so it confused the in
> kernel test.

Perhaps this would be more desirable?

Index: linux-2.6.0-test9-mm3/arch/i386/mm/fault.c
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test9-mm3/arch/i386/mm/fault.c,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 fault.c
--- linux-2.6.0-test9-mm3/arch/i386/mm/fault.c 13 Nov 2003 08:07:17 -0000 1.1.1.1
+++ linux-2.6.0-test9-mm3/arch/i386/mm/fault.c 15 Nov 2003 19:40:17 -0000
@@ -264,7 +264,9 @@ asmlinkage void do_page_fault(struct pt_
if (error_code & 3)
goto bad_area_nosemaphore;

- goto vmalloc_fault;
+ /* If it's vm86 fall through */
+ if (!(regs->eflags & VM_MASK))
+ goto vmalloc_fault;
}
#else
if (unlikely(address >= TASK_SIZE)) {
-
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