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TOMOYO Linux Cross Reference
Linux/arch/um/include/asm/mmu_context.h

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  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 

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