b668e351fd6c2e4f7a4b75c8a67eada77449abc9
2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
6 #ifndef __UM_MMU_CONTEXT_H
7 #define __UM_MMU_CONTEXT_H
9 #include <linux/sched.h>
10 #include <linux/mm_types.h>
14 extern void uml_setup_stubs(struct mm_struct
*mm
);
16 * Needed since we do not use the asm-generic/mm_hooks.h:
18 static inline void arch_dup_mmap(struct mm_struct
*oldmm
, struct mm_struct
*mm
)
22 extern void arch_exit_mmap(struct mm_struct
*mm
);
23 static inline void arch_unmap(struct mm_struct
*mm
,
24 struct vm_area_struct
*vma
,
25 unsigned long start
, unsigned long end
)
28 static inline void arch_bprm_mm_init(struct mm_struct
*mm
,
29 struct vm_area_struct
*vma
)
33 static inline bool arch_vma_access_permitted(struct vm_area_struct
*vma
,
34 bool write
, bool execute
, bool foreign
)
36 /* by default, allow everything */
41 * end asm-generic/mm_hooks.h functions
44 #define deactivate_mm(tsk,mm) do { } while (0)
46 extern void force_flush_all(void);
48 static inline void activate_mm(struct mm_struct
*old
, struct mm_struct
*new)
51 * This is called by fs/exec.c and sys_unshare()
52 * when the new ->mm is used for the first time.
54 __switch_mm(&new->context
.id
);
55 down_write(&new->mmap_sem
);
57 up_write(&new->mmap_sem
);
60 static inline void switch_mm(struct mm_struct
*prev
, struct mm_struct
*next
,
61 struct task_struct
*tsk
)
63 unsigned cpu
= smp_processor_id();
66 cpumask_clear_cpu(cpu
, mm_cpumask(prev
));
67 cpumask_set_cpu(cpu
, mm_cpumask(next
));
69 __switch_mm(&next
->context
.id
);
73 static inline void enter_lazy_tlb(struct mm_struct
*mm
,
74 struct task_struct
*tsk
)
78 extern int init_new_context(struct task_struct
*task
, struct mm_struct
*mm
);
80 extern void destroy_context(struct mm_struct
*mm
);