77 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __ASM_GENERIC_MMU_CONTEXT_H3#define __ASM_GENERIC_MMU_CONTEXT_H4 5/*6 * Generic hooks to implement no-op functionality.7 */8 9struct task_struct;10struct mm_struct;11 12/*13 * enter_lazy_tlb - Called when "tsk" is about to enter lazy TLB mode.14 *15 * @mm: the currently active mm context which is becoming lazy16 * @tsk: task which is entering lazy tlb17 *18 * tsk->mm will be NULL19 */20#ifndef enter_lazy_tlb21static inline void enter_lazy_tlb(struct mm_struct *mm,22 struct task_struct *tsk)23{24}25#endif26 27/**28 * init_new_context - Initialize context of a new mm_struct.29 * @tsk: task struct for the mm30 * @mm: the new mm struct31 * @return: 0 on success, -errno on failure32 */33#ifndef init_new_context34static inline int init_new_context(struct task_struct *tsk,35 struct mm_struct *mm)36{37 return 0;38}39#endif40 41/**42 * destroy_context - Undo init_new_context when the mm is going away43 * @mm: old mm struct44 */45#ifndef destroy_context46static inline void destroy_context(struct mm_struct *mm)47{48}49#endif50 51/**52 * activate_mm - called after exec switches the current task to a new mm, to switch to it53 * @prev_mm: previous mm of this task54 * @next_mm: new mm55 */56#ifndef activate_mm57static inline void activate_mm(struct mm_struct *prev_mm,58 struct mm_struct *next_mm)59{60 switch_mm(prev_mm, next_mm, current);61}62#endif63 64/**65 * dectivate_mm - called when an mm is released after exit or exec switches away from it66 * @tsk: the task67 * @mm: the old mm68 */69#ifndef deactivate_mm70static inline void deactivate_mm(struct task_struct *tsk,71 struct mm_struct *mm)72{73}74#endif75 76#endif /* __ASM_GENERIC_MMU_CONTEXT_H */77