[PATCH] Re: [405EX] Bad page map in process ...

[Weirich, Bernhard]

Hello,

I found the cause of the problem.
My architecture does not define the _PAGE_SPECIAL macro, thus in pte-common.h line 32, it is defined as 0
And then in line 180, since _PAGE_SPECIAL is defined, the macro __HAVE_ARCH_PTE_SPECIAL is erroneously defined.
This makes any ppc architecture to act as if it has a pte special bit!
I suggest the following simple patch to fix this.

Bernhard WEIRICH
Software Development


Signed-off-by: Bernhard Weirich <bernhard.weirich at riedel.net>
--- linux/arch/powerpc/include/asm/pte-common.h	2009-09-16 11:23:44.000000000 +0200
+++ linux/arch/powerpc/include/asm/pte-common.h	2009-09-22 11:13:08.000000000 +0200
@@ -176,7 +176,7 @@
 #define HAVE_PAGE_AGP
 
 /* Advertise support for _PAGE_SPECIAL */
-#ifdef _PAGE_SPECIAL
+#if _PAGE_SPECIAL != 0
 #define __HAVE_ARCH_PTE_SPECIAL
 #endif