1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
6 #ifndef __UM_MMU_CONTEXT_H
7 #define __UM_MMU_CONTEXT_H
9 #include <linux/sched.h>
10 #include <linux/mm_types.h>
11 #include <linux/mmap_lock.h>
15 extern void uml_setup_stubs(struct mm_struct *mm);
17 * Needed since we do not use the asm-generic/mm_hooks.h:
19 static inline int arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
24 extern void arch_exit_mmap(struct mm_struct *mm);
25 static inline void arch_unmap(struct mm_struct *mm,
26 unsigned long start, unsigned long end)
29 static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
30 bool write, bool execute, bool foreign)
32 /* by default, allow everything */
37 * end asm-generic/mm_hooks.h functions
40 extern void force_flush_all(void);
42 #define activate_mm activate_mm
43 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
46 * This is called by fs/exec.c and sys_unshare()
47 * when the new ->mm is used for the first time.
49 __switch_mm(&new->context.id);
50 mmap_write_lock_nested(new, SINGLE_DEPTH_NESTING);
52 mmap_write_unlock(new);
55 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
56 struct task_struct *tsk)
58 unsigned cpu = smp_processor_id();
61 cpumask_clear_cpu(cpu, mm_cpumask(prev));
62 cpumask_set_cpu(cpu, mm_cpumask(next));
64 __switch_mm(&next->context.id);
68 #define init_new_context init_new_context
69 extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
71 #define destroy_context destroy_context
72 extern void destroy_context(struct mm_struct *mm);
74 #include <asm-generic/mmu_context.h>