asm-generic: add generic MMU versions of mmu context functions (94f89922) · Commits · 戴 / test

arch/c6x/include/asm/mmu_context.h

0 → 100644

+6 −0

Original line number	Diff line number	Diff line
		#ifndef _ASM_C6X_MMU_CONTEXT_H
		#define _ASM_C6X_MMU_CONTEXT_H

		#include <asm-generic/nommu_context.h>

		#endif /* _ASM_C6X_MMU_CONTEXT_H */

arch/microblaze/include/asm/mmu_context.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -2,5 +2,5 @@
		#ifdef CONFIG_MMU
		# include <asm/mmu_context_mm.h>
		#else
		# include <asm-generic/mmu_context.h>
		# include <asm-generic/nommu_context.h>
		#endif

arch/sh/include/asm/mmu_context.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -133,7 +133,7 @@ static inline void switch_mm(struct mm_struct *prev,
		#define set_TTB(pgd) do { } while (0)
		#define get_TTB() (0)

		#include <asm-generic/mmu_context.h>
		#include <asm-generic/nommu_context.h>

		#endif /* CONFIG_MMU */

include/asm-generic/mmu_context.h

+44 −14

Original line number	Diff line number	Diff line
		@@ -3,44 +3,74 @@
		#define __ASM_GENERIC_MMU_CONTEXT_H

		/*
		* Generic hooks for NOMMU architectures, which do not need to do
		* anything special here.
		* Generic hooks to implement no-op functionality.
		*/

		#include <asm-generic/mm_hooks.h>

		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

		static inline void deactivate_mm(struct task_struct *task,
		struct mm_struct *mm)
		{
		}

		static inline void switch_mm(struct mm_struct *prev,
		struct mm_struct *next,
		struct task_struct *tsk)
		/**
		* 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

		static inline void activate_mm(struct mm_struct *prev_mm,
		struct mm_struct *next_mm)
		/**
		* 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 */

include/asm-generic/nommu_context.h

0 → 100644

+19 −0

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0 */
		#ifndef __ASM_GENERIC_NOMMU_H
		#define __ASM_GENERIC_NOMMU_H

		/*
		* Generic hooks for NOMMU architectures, which do not need to do
		* anything special here.
		*/
		#include <asm-generic/mm_hooks.h>

		static inline void switch_mm(struct mm_struct *prev,
		struct mm_struct *next,
		struct task_struct *tsk)
		{
		}

		#include <asm-generic/mmu_context.h>

		#endif /* __ASM_GENERIC_NOMMU_H */

Admin message