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 #define activate_mm activate_mm 17 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new) 18 { 19 /* 20 * This is called by fs/exec.c and sys_unshare() 21 * when the new ->mm is used for the first time. 22 */ 23 __switch_mm(&new->context.id); 24 } 25 26 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 27 struct task_struct *tsk) 28 { 29 unsigned cpu = smp_processor_id(); 30 31 if(prev != next){ 32 cpumask_clear_cpu(cpu, mm_cpumask(prev)); 33 cpumask_set_cpu(cpu, mm_cpumask(next)); 34 if(next != &init_mm) 35 __switch_mm(&next->context.id); 36 } 37 } 38 39 #define init_new_context init_new_context 40 extern int init_new_context(struct task_struct *task, struct mm_struct *mm); 41 42 #define destroy_context destroy_context 43 extern void destroy_context(struct mm_struct *mm); 44 45 #include <asm-generic/mmu_context.h> 46 47 #endif 48