add more stability fixes for brcm47xx-2.6 on bcm4704 (from #1485)

SVN-Revision: 6642

target/linux/brcm47xx-2.6/patches/160-kmap_coherent.patch

@@ -0,0 +1,48 @@
+--- ./arch/mips/mm/init.c.orig	2007-03-22 08:08:34.000000000 -0600
++++ ./arch/mips/mm/init.c	2007-03-22 08:09:04.000000000 -0600
+@@ -207,7 +207,7 @@
+ 	struct page *page, unsigned long vaddr, void *dst, const void *src,
+ 	unsigned long len)
+ {
+-	if (cpu_has_dc_aliases) {
++	if (cpu_has_dc_aliases && cpu_use_kmap_coherent) {
+ 		void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
+ 		memcpy(vto, src, len);
+ 		kunmap_coherent(page);
+@@ -223,7 +223,7 @@
+ 	struct page *page, unsigned long vaddr, void *dst, const void *src,
+ 	unsigned long len)
+ {
+-	if (cpu_has_dc_aliases) {
++	if (cpu_has_dc_aliases && cpu_use_kmap_coherent) {
+ 		void *vfrom =
+ 			kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
+ 		memcpy(dst, vfrom, len);
+--- ./include/asm-mips/mach-bcm947xx/cpu-feature-overrides.h.orig	2007-03-22 08:10:54.000000000 -0600
++++ ./include/asm-mips/mach-bcm947xx/cpu-feature-overrides.h	2007-03-22 08:10:50.000000000 -0600
+@@ -0,0 +1,13 @@
++/*
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License.  See the file "COPYING" in the main directory of this archive
++ * for more details.
++ *
++ * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
++ */
++#ifndef __ASM_MACH_BCM947XX_CPU_FEATURE_OVERRIDES_H
++#define __ASM_MACH_BCM947XX_CPU_FEATURE_OVERRIDES_H
++
++#define cpu_use_kmap_coherent	0
++
++#endif /* __ASM_MACH_BCM947XX_CPU_FEATURE_OVERRIDES_H */
+--- ./include/asm-mips/cpu-features.h.orig	2007-03-22 08:09:16.000000000 -0600
++++ ./include/asm-mips/cpu-features.h	2007-03-22 08:09:52.000000000 -0600
+@@ -98,6 +98,9 @@
+ #ifndef cpu_has_pindexed_dcache
+ #define cpu_has_pindexed_dcache	(cpu_data[0].dcache.flags & MIPS_CACHE_PINDEX)
+ #endif
++#ifndef cpu_use_kmap_coherent
++#define cpu_use_kmap_coherent 1
++#endif
+ 
+ /*
+  * I-Cache snoops remote store.  This only matters on SMP.  Some multiprocessors