1 /* 2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 3 * Licensed under the GPL 4 */ 5 6 #ifndef __UM_MMU_CONTEXT_H 7 #define __UM_MMU_CONTEXT_H 8 9 #include <linux/sched.h> 10 #include <asm/mmu.h> 11 12 extern void uml_setup_stubs(struct mm_struct *mm); 13 extern void arch_exit_mmap(struct mm_struct *mm); 14 15 #define deactivate_mm(tsk,mm) do { } while (0) 16 17 extern void force_flush_all(void); 18 19 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new) 20 { 21 /* 22 * This is called by fs/exec.c and sys_unshare() 23 * when the new ->mm is used for the first time. 24 */ 25 __switch_mm(&new->context.id); 26 down_write(&new->mmap_sem); 27 uml_setup_stubs(new); 28 up_write(&new->mmap_sem); 29 } 30 31 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 32 struct task_struct *tsk) 33 { 34 unsigned cpu = smp_processor_id(); 35 36 if(prev != next){ 37 cpumask_clear_cpu(cpu, mm_cpumask(prev)); 38 cpumask_set_cpu(cpu, mm_cpumask(next)); 39 if(next != &init_mm) 40 __switch_mm(&next->context.id); 41 } 42 } 43 44 static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) 45 { 46 uml_setup_stubs(mm); 47 } 48 49 static inline void enter_lazy_tlb(struct mm_struct *mm, 50 struct task_struct *tsk) 51 { 52 } 53 54 extern int init_new_context(struct task_struct *task, struct mm_struct *mm); 55 56 extern void destroy_context(struct mm_struct *mm); 57 58 #endif 59