Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / um / include / asm / mmu_context.h

diff --git a/kernel/arch/um/include/asm/mmu_context.h b/kernel/arch/um/include/asm/mmu_context.h
new file mode 100644 (file)
index 0000000..941527e
--- /dev/null
+++ b/kernel/arch/um/include/asm/mmu_context.h
@@ -0,0 +1,72 @@
+/* 
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_MMU_CONTEXT_H
+#define __UM_MMU_CONTEXT_H
+
+#include <linux/sched.h>
+#include <asm/mmu.h>
+
+extern void uml_setup_stubs(struct mm_struct *mm);
+/*
+ * Needed since we do not use the asm-generic/mm_hooks.h:
+ */
+static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+{
+       uml_setup_stubs(mm);
+}
+extern void arch_exit_mmap(struct mm_struct *mm);
+static inline void arch_unmap(struct mm_struct *mm,
+                       struct vm_area_struct *vma,
+                       unsigned long start, unsigned long end)
+{
+}
+static inline void arch_bprm_mm_init(struct mm_struct *mm,
+                                    struct vm_area_struct *vma)
+{
+}
+/*
+ * end asm-generic/mm_hooks.h functions
+ */
+
+#define deactivate_mm(tsk,mm)  do { } while (0)
+
+extern void force_flush_all(void);
+
+static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
+{
+       /*
+        * This is called by fs/exec.c and sys_unshare()
+        * when the new ->mm is used for the first time.
+        */
+       __switch_mm(&new->context.id);
+       down_write(&new->mmap_sem);
+       uml_setup_stubs(new);
+       up_write(&new->mmap_sem);
+}
+
+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){
+               cpumask_clear_cpu(cpu, mm_cpumask(prev));
+               cpumask_set_cpu(cpu, mm_cpumask(next));
+               if(next != &init_mm)
+                       __switch_mm(&next->context.id);
+       }
+}
+
+static inline void enter_lazy_tlb(struct mm_struct *mm, 
+                                 struct task_struct *tsk)
+{
+}
+
+extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
+
+extern void destroy_context(struct mm_struct *mm);
+
+#endif