mirror of
https://github.com/torvalds/linux.git
synced 2024-11-23 12:42:02 +00:00
94f89922e1
Many of these are no-ops on many architectures, so extend mmu_context.h to cover MMU and NOMMU, and split the NOMMU bits out to nommu_context.h Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: linux-arch@vger.kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de>
77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
/* 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 */
|