openwrt-xburst/target/linux/brcm47xx/patches-2.6.23/310-no_highpage.patch

Index: linux-2.6.23.17/arch/mips/mm/init.c
===================================================================
--- linux-2.6.23.17.orig/arch/mips/mm/init.c
+++ linux-2.6.23.17/arch/mips/mm/init.c
@@ -205,31 +205,6 @@ void kunmap_coherent(void)
 	preempt_check_resched();
 }
 
-void copy_user_highpage(struct page *to, struct page *from,
-	unsigned long vaddr, struct vm_area_struct *vma)
-{
-	void *vfrom, *vto;
-
-	vto = kmap_atomic(to, KM_USER1);
-	if (cpu_has_dc_aliases && cpu_use_kmap_coherent && !Page_dcache_dirty(from)) {
-		vfrom = kmap_coherent(from, vaddr);
-		copy_page(vto, vfrom);
-		kunmap_coherent();
-	} else {
-		vfrom = kmap_atomic(from, KM_USER0);
-		copy_page(vto, vfrom);
-		kunmap_atomic(vfrom, KM_USER0);
-	}
-	if (((vma->vm_flags & VM_EXEC) && !cpu_has_ic_fills_f_dc) ||
-	    pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
-		flush_data_cache_page((unsigned long)vto);
-	kunmap_atomic(vto, KM_USER1);
-	/* Make sure this page is cleared on other CPU's too before using it */
-	smp_wmb();
-}
-
-EXPORT_SYMBOL(copy_user_highpage);
-
 void copy_to_user_page(struct vm_area_struct *vma,
 	struct page *page, unsigned long vaddr, void *dst, const void *src,
 	unsigned long len)
Index: linux-2.6.23.17/include/asm-mips/page.h
===================================================================
--- linux-2.6.23.17.orig/include/asm-mips/page.h
+++ linux-2.6.23.17/include/asm-mips/page.h
@@ -35,6 +35,7 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/pfn.h>
+#include <asm/cpu-features.h>
 #include <asm/io.h>
 
 /*
@@ -67,13 +68,16 @@ static inline void clear_user_page(void 
 		flush_data_cache_page((unsigned long)addr);
 }
 
-extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
-	struct page *to);
-struct vm_area_struct;
-extern void copy_user_highpage(struct page *to, struct page *from,
-	unsigned long vaddr, struct vm_area_struct *vma);
+static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
+	struct page *to)
+{
+	extern void (*flush_data_cache_page)(unsigned long addr);
 
-#define __HAVE_ARCH_COPY_USER_HIGHPAGE
+	copy_page(vto, vfrom);
+	if (!cpu_has_ic_fills_f_dc ||
+	    pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
+		flush_data_cache_page((unsigned long)vto);
+}
 
 /*
  * These are used to make use of C type-checking..