wifipineapple-openwrt/target/linux/brcm47xx/patches-2.6.25/160-kmap_coherent.patch

78 lines
2.4 KiB
Diff

--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -211,7 +211,7 @@
void *vfrom, *vto;
vto = kmap_atomic(to, KM_USER1);
- if (cpu_has_dc_aliases &&
+ if (cpu_has_dc_aliases && cpu_use_kmap_coherent &&
page_mapped(from) && !Page_dcache_dirty(from)) {
vfrom = kmap_coherent(from, vaddr);
copy_page(vto, vfrom);
@@ -235,7 +235,7 @@
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 &&
page_mapped(page) && !Page_dcache_dirty(page)) {
void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
memcpy(vto, src, len);
@@ -255,7 +255,7 @@
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 &&
page_mapped(page) && !Page_dcache_dirty(page)) {
void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
memcpy(dst, vfrom, len);
--- /dev/null
+++ b/include/asm-mips/mach-bcm47xx/cpu-feature-overrides.h
@@ -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_BCM47XX_CPU_FEATURE_OVERRIDES_H
+#define __ASM_MACH_BCM47XX_CPU_FEATURE_OVERRIDES_H
+
+#define cpu_use_kmap_coherent 0
+
+#endif /* __ASM_MACH_BCM47XX_CPU_FEATURE_OVERRIDES_H */
--- a/include/asm-mips/cpu-features.h
+++ b/include/asm-mips/cpu-features.h
@@ -101,6 +101,9 @@
#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
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -484,7 +484,7 @@
* Use kmap_coherent or kmap_atomic to do flushes for
* another ASID than the current one.
*/
- if (cpu_has_dc_aliases)
+ if (cpu_has_dc_aliases && cpu_use_kmap_coherent)
vaddr = kmap_coherent(page, addr);
else
vaddr = kmap_atomic(page, KM_USER0);
@@ -505,7 +505,7 @@
}
if (vaddr) {
- if (cpu_has_dc_aliases)
+ if (cpu_has_dc_aliases && cpu_use_kmap_coherent)
kunmap_coherent();
else
kunmap_atomic(vaddr, KM_USER0);