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