This patch removes the bogus workaround for dcache prefetch
beyond the end of the physical memory.
Signed-off-by: Eugene Surovegin <ebs at ebshome.net>
Signed-off-by: Matt Porter <mporter at kernel.crashing.org>
===== arch/ppc/mm/44x_mmu.c 1.5 vs edited =====
--- 1.5/arch/ppc/mm/44x_mmu.c 2004-10-05 23:05:22 -07:00
+++ edited/arch/ppc/mm/44x_mmu.c 2004-10-09 21:06:22 -07:00
@@ -55,10 +55,8 @@
#include <asm/setup.h>
#include "mmu_decl.h"
-#include "mem_pieces.h"
extern char etext[], _stext[];
-extern struct mem_pieces phys_avail;
/* Used by the 44x TLB replacement exception handler.
* Just needed it declared someplace.
@@ -104,16 +102,6 @@
{
unsigned int pinned_tlbs = 1;
int i;
-
- /*
- * If lowmem is not on a pin tlb entry size boundary,
- * then reserve the last page of system memory. This
- * eliminates the possibility of a speculative dcache
- * fetch past the end of system memory that would
- * result in a machine check exception.
- */
- if (total_lowmem | (PPC44x_PIN_SIZE - 1))
- mem_pieces_remove(&phys_avail, total_lowmem - PAGE_SIZE,
PAGE_SIZE, 1);
/* Determine number of entries necessary to cover lowmem */
pinned_tlbs = (unsigned int)
