/* 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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