diff --git a/include/asm-um/mmu_context.h b/include/asm-um/mmu_context.h
new file mode 100644
index 0000000..89bff31
--- /dev/null
+++ b/include/asm-um/mmu_context.h
@@ -0,0 +1,76 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_MMU_CONTEXT_H
+#define __UM_MMU_CONTEXT_H
+
+#include "linux/sched.h"
+#include "choose-mode.h"
+
+#define get_mmu_context(task) do ; while(0)
+#define activate_context(tsk) do ; while(0)
+
+#define deactivate_mm(tsk,mm)	do { } while (0)
+
+static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
+{
+}
+
+extern void switch_mm_skas(int mm_fd);
+
+static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 
+			     struct task_struct *tsk)
+{
+	unsigned cpu = smp_processor_id();
+
+	if(prev != next){
+		cpu_clear(cpu, prev->cpu_vm_mask);
+		cpu_set(cpu, next->cpu_vm_mask);
+		if(next != &init_mm)
+			CHOOSE_MODE((void) 0, 
+				    switch_mm_skas(next->context.skas.mm_fd));
+	}
+}
+
+static inline void enter_lazy_tlb(struct mm_struct *mm, 
+				  struct task_struct *tsk)
+{
+}
+
+extern int init_new_context_skas(struct task_struct *task, 
+				 struct mm_struct *mm);
+
+static inline int init_new_context_tt(struct task_struct *task, 
+				      struct mm_struct *mm)
+{
+	return(0);
+}
+
+static inline int init_new_context(struct task_struct *task, 
+				   struct mm_struct *mm)
+{
+	return(CHOOSE_MODE_PROC(init_new_context_tt, init_new_context_skas, 
+				task, mm));
+}
+
+extern void destroy_context_skas(struct mm_struct *mm);
+
+static inline void destroy_context(struct mm_struct *mm)
+{
+	CHOOSE_MODE((void) 0, destroy_context_skas(mm));
+}
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */