From: Peter Denison <openwrt@marshadder.org>
Date: Sun, 18 May 2008 21:31:41 +0000 (+0000)
Subject: Fix kmap_coherent use on 2.6.25 kernels
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a9a321d21ccb6f728fb75183b89dcdb69adaa825;p=openwrt%2Fstaging%2Fnbd.git

Fix kmap_coherent use on 2.6.25 kernels

SVN-Revision: 11191
---

diff --git a/target/linux/brcm47xx/patches-2.6.25/160-kmap_coherent.patch b/target/linux/brcm47xx/patches-2.6.25/160-kmap_coherent.patch
index 1b50bb3809..612ab981a6 100644
--- a/target/linux/brcm47xx/patches-2.6.25/160-kmap_coherent.patch
+++ b/target/linux/brcm47xx/patches-2.6.25/160-kmap_coherent.patch
@@ -1,7 +1,7 @@
-Index: linux-2.6.25/arch/mips/mm/init.c
+Index: linux-2.6.25.1/arch/mips/mm/init.c
 ===================================================================
---- linux-2.6.25.orig/arch/mips/mm/init.c	2008-04-26 21:56:21.000000000 +0100
-+++ linux-2.6.25/arch/mips/mm/init.c	2008-04-26 22:07:48.000000000 +0100
+--- linux-2.6.25.1.orig/arch/mips/mm/init.c	2008-05-18 11:32:33.000000000 +0100
++++ linux-2.6.25.1/arch/mips/mm/init.c	2008-05-18 21:05:57.000000000 +0100
 @@ -211,7 +211,7 @@ void copy_user_highpage(struct page *to,
  	void *vfrom, *vto;
  
@@ -29,10 +29,10 @@ Index: linux-2.6.25/arch/mips/mm/init.c
  	    page_mapped(page) && !Page_dcache_dirty(page)) {
  		void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
  		memcpy(dst, vfrom, len);
-Index: linux-2.6.25/include/asm-mips/mach-bcm47xx/cpu-feature-overrides.h
+Index: linux-2.6.25.1/include/asm-mips/mach-bcm47xx/cpu-feature-overrides.h
 ===================================================================
 --- /dev/null	1970-01-01 00:00:00.000000000 +0000
-+++ linux-2.6.25/include/asm-mips/mach-bcm47xx/cpu-feature-overrides.h	2008-04-26 21:57:15.000000000 +0100
++++ linux-2.6.25.1/include/asm-mips/mach-bcm47xx/cpu-feature-overrides.h	2008-05-18 11:32:40.000000000 +0100
 @@ -0,0 +1,13 @@
 +/*
 + * This file is subject to the terms and conditions of the GNU General Public
@@ -47,10 +47,10 @@ Index: linux-2.6.25/include/asm-mips/mach-bcm47xx/cpu-feature-overrides.h
 +#define cpu_use_kmap_coherent	0
 +
 +#endif /* __ASM_MACH_BCM47XX_CPU_FEATURE_OVERRIDES_H */
-Index: linux-2.6.25/include/asm-mips/cpu-features.h
+Index: linux-2.6.25.1/include/asm-mips/cpu-features.h
 ===================================================================
---- linux-2.6.25.orig/include/asm-mips/cpu-features.h	2008-04-26 21:56:21.000000000 +0100
-+++ linux-2.6.25/include/asm-mips/cpu-features.h	2008-04-26 21:57:15.000000000 +0100
+--- linux-2.6.25.1.orig/include/asm-mips/cpu-features.h	2008-05-18 11:32:33.000000000 +0100
++++ linux-2.6.25.1/include/asm-mips/cpu-features.h	2008-05-18 11:32:40.000000000 +0100
 @@ -101,6 +101,9 @@
  #ifndef cpu_has_pindexed_dcache
  #define cpu_has_pindexed_dcache	(cpu_data[0].dcache.flags & MIPS_CACHE_PINDEX)
@@ -61,3 +61,25 @@ Index: linux-2.6.25/include/asm-mips/cpu-features.h
  
  /*
   * I-Cache snoops remote store.  This only matters on SMP.  Some multiprocessors
+Index: linux-2.6.25.1/arch/mips/mm/c-r4k.c
+===================================================================
+--- linux-2.6.25.1.orig/arch/mips/mm/c-r4k.c	2008-05-18 21:06:36.000000000 +0100
++++ linux-2.6.25.1/arch/mips/mm/c-r4k.c	2008-05-18 21:09:28.000000000 +0100
+@@ -484,7 +484,7 @@ static inline void local_r4k_flush_cache
+ 		 * 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 @@ static inline void local_r4k_flush_cache
+ 	}
+ 
+ 	if (vaddr) {
+-		if (cpu_has_dc_aliases)
++		if (cpu_has_dc_aliases && cpu_use_kmap_coherent)
+ 			kunmap_coherent();
+ 		else
+ 			kunmap_atomic(vaddr, KM_USER0);