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76 lines
1.6 KiB
76 lines
1.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __ASM_GENERIC_MMU_CONTEXT_H |
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#define __ASM_GENERIC_MMU_CONTEXT_H |
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/* |
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* Generic hooks to implement no-op functionality. |
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*/ |
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struct task_struct; |
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struct mm_struct; |
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/* |
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* enter_lazy_tlb - Called when "tsk" is about to enter lazy TLB mode. |
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* |
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* @mm: the currently active mm context which is becoming lazy |
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* @tsk: task which is entering lazy tlb |
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* |
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* tsk->mm will be NULL |
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*/ |
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#ifndef enter_lazy_tlb |
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static inline void enter_lazy_tlb(struct mm_struct *mm, |
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struct task_struct *tsk) |
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{ |
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} |
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#endif |
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/** |
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* init_new_context - Initialize context of a new mm_struct. |
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* @tsk: task struct for the mm |
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* @mm: the new mm struct |
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* @return: 0 on success, -errno on failure |
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*/ |
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#ifndef init_new_context |
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static inline int init_new_context(struct task_struct *tsk, |
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struct mm_struct *mm) |
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{ |
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return 0; |
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} |
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#endif |
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/** |
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* destroy_context - Undo init_new_context when the mm is going away |
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* @mm: old mm struct |
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*/ |
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#ifndef destroy_context |
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static inline void destroy_context(struct mm_struct *mm) |
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{ |
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} |
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#endif |
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/** |
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* activate_mm - called after exec switches the current task to a new mm, to switch to it |
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* @prev_mm: previous mm of this task |
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* @next_mm: new mm |
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*/ |
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#ifndef activate_mm |
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static inline void activate_mm(struct mm_struct *prev_mm, |
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struct mm_struct *next_mm) |
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{ |
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switch_mm(prev_mm, next_mm, current); |
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} |
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#endif |
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/** |
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* dectivate_mm - called when an mm is released after exit or exec switches away from it |
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* @tsk: the task |
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* @mm: the old mm |
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*/ |
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#ifndef deactivate_mm |
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static inline void deactivate_mm(struct task_struct *tsk, |
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struct mm_struct *mm) |
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{ |
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} |
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#endif |
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#endif /* __ASM_GENERIC_MMU_CONTEXT_H */
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