1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 4 */ 5 6 #ifndef __UM_MMU_CONTEXT_H 7 #define __UM_MMU_CONTEXT_H 8 9 #include <linux/sched.h> 10 #include <linux/mm_types.h> 11 #include <linux/mmap_lock.h> 12 13 #include <asm/mm_hooks.h> 14 #include <asm/mmu.h> 15 16 extern void force_flush_all(void); 17 18 #define activate_mm activate_mm 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 } 27 28 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 29 struct task_struct *tsk) 30 { 31 unsigned cpu = smp_processor_id(); 32 33 if(prev != next){ 34 cpumask_clear_cpu(cpu, mm_cpumask(prev)); 35 cpumask_set_cpu(cpu, mm_cpumask(next)); 36 if(next != &init_mm) 37 __switch_mm(&next->context.id); 38 } 39 } 40 41 #define init_new_context init_new_context 42 extern int init_new_context(struct task_struct *task, struct mm_struct *mm); 43 44 #define destroy_context destroy_context 45 extern void destroy_context(struct mm_struct *mm); 46 47 #include <asm-generic/mmu_context.h> 48 49 #endif 50