powerpc/mm: Fix 40x and 8xx vs. _PAGE_SPECIAL

The test to check whether we have _PAGE_SPECIAL defined is broken,
since we always define it, just not always to a meaninful value :-)

That broke 8xx and 40x under some circumstances.

This fixes it by adding _PAGE_SPECIAL for both of these since they
had a free PTE bit, and removing the condition around advertising
it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2009-09-22 18:12:26 +00:00
parent 142597dbbd
commit f32af63ed1
3 changed files with 2 additions and 5 deletions

View File

@ -43,6 +43,7 @@
#define _PAGE_NO_CACHE 0x004 /* I: caching is inhibited */
#define _PAGE_WRITETHRU 0x008 /* W: caching is write-through */
#define _PAGE_USER 0x010 /* matches one of the zone permission bits */
#define _PAGE_SPECIAL 0x020 /* software: Special page */
#define _PAGE_RW 0x040 /* software: Writes permitted */
#define _PAGE_DIRTY 0x080 /* software: dirty page */
#define _PAGE_HWWRITE 0x100 /* hardware: Dirty & RW, set in exception */

View File

@ -32,6 +32,7 @@
#define _PAGE_FILE 0x0002 /* when !present: nonlinear file mapping */
#define _PAGE_NO_CACHE 0x0002 /* I: cache inhibit */
#define _PAGE_SHARED 0x0004 /* No ASID (context) compare */
#define _PAGE_SPECIAL 0x0008 /* SW entry, forced to 0 by the TLB miss */
/* These five software bits must be masked out when the entry is loaded
* into the TLB.

View File

@ -25,9 +25,6 @@
#ifndef _PAGE_WRITETHRU
#define _PAGE_WRITETHRU 0
#endif
#ifndef _PAGE_SPECIAL
#define _PAGE_SPECIAL 0
#endif
#ifndef _PAGE_4K_PFN
#define _PAGE_4K_PFN 0
#endif
@ -179,7 +176,5 @@ extern unsigned long bad_call_to_PMD_PAGE_SIZE(void);
#define HAVE_PAGE_AGP
/* Advertise support for _PAGE_SPECIAL */
#ifdef _PAGE_SPECIAL
#define __HAVE_ARCH_PTE_SPECIAL
#endif