diff -Naurp linux-2.6.15.1.orig/arch/mips/mm/c-r4k.c linux-2.6.15.1/arch/mips/mm/c-r4k.c
--- linux-2.6.15.1.orig/arch/mips/mm/c-r4k.c	2006-01-31 22:06:43.000000000 -0500
+++ linux-2.6.15.1/arch/mips/mm/c-r4k.c	2006-02-01 00:13:25.000000000 -0500
@@ -464,8 +464,8 @@ static void r4k_flush_data_cache_page(un
 }
 
 struct flush_icache_range_args {
-	unsigned long __user start;
-	unsigned long __user end;
+	unsigned long start;
+	unsigned long end;
 };
 
 static inline void local_r4k_flush_icache_range(void *args)
@@ -528,8 +528,7 @@ static inline void local_r4k_flush_icach
 	}
 }
 
-static void r4k_flush_icache_range(unsigned long __user start,
-	unsigned long __user end)
+static void r4k_flush_icache_range(unsigned long start, unsigned long end)
 {
 	struct flush_icache_range_args args;
 
diff -Naurp linux-2.6.15.1.orig/arch/mips/mm/cache.c linux-2.6.15.1/arch/mips/mm/cache.c
--- linux-2.6.15.1.orig/arch/mips/mm/cache.c	2006-01-02 22:21:10.000000000 -0500
+++ linux-2.6.15.1/arch/mips/mm/cache.c	2006-02-01 00:13:25.000000000 -0500
@@ -25,8 +25,7 @@ void (*flush_cache_range)(struct vm_area
 	unsigned long end);
 void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page,
 	unsigned long pfn);
-void (*flush_icache_range)(unsigned long __user start,
-	unsigned long __user end);
+void (*flush_icache_range)(unsigned long start, unsigned long end);
 void (*flush_icache_page)(struct vm_area_struct *vma, struct page *page);
 
 /* MIPS specific cache operations */
@@ -53,7 +52,7 @@ EXPORT_SYMBOL(_dma_cache_inv);
  * We could optimize the case where the cache argument is not BCACHE but
  * that seems very atypical use ...
  */
-asmlinkage int sys_cacheflush(unsigned long __user addr,
+asmlinkage int sys_cacheflush(unsigned long addr,
 	unsigned long bytes, unsigned int cache)
 {
 	if (bytes == 0)
diff -Naurp linux-2.6.15.1.orig/include/asm-mips/cacheflush.h linux-2.6.15.1/include/asm-mips/cacheflush.h
--- linux-2.6.15.1.orig/include/asm-mips/cacheflush.h	2006-01-02 22:21:10.000000000 -0500
+++ linux-2.6.15.1/include/asm-mips/cacheflush.h	2006-02-01 00:13:25.000000000 -0500
@@ -49,8 +49,7 @@ static inline void flush_dcache_page(str
 
 extern void (*flush_icache_page)(struct vm_area_struct *vma,
 	struct page *page);
-extern void (*flush_icache_range)(unsigned long __user start,
-	unsigned long __user end);
+extern void (*flush_icache_range)(unsigned long start, unsigned long end);
 #define flush_cache_vmap(start, end)		flush_cache_all()
 #define flush_cache_vunmap(start, end)		flush_cache_all()