cregit-Linux how code gets into the kernel

Release 4.14 arch/nios2/include/asm/mmu_context.h

/*
 * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
 * Copyright (C) 1996, 1997, 1998, 1999 by Ralf Baechle
 * Copyright (C) 1999 Silicon Graphics, Inc.
 *
 * based on MIPS asm/mmu_context.h
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#ifndef _ASM_NIOS2_MMU_CONTEXT_H

#define _ASM_NIOS2_MMU_CONTEXT_H

#include <linux/mm_types.h>

#include <asm-generic/mm_hooks.h>

extern void mmu_context_init(void);
extern unsigned long get_pid_from_context(mm_context_t *ctx);

/*
 * For the fast tlb miss handlers, we keep a pointer to the current pgd.
 * processor.
 */
extern pgd_t *pgd_current;


static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) { }

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/* * Initialize the context related info for a new mm_struct instance. * * Set all new contexts to 0, that way the generation will never match * the currently running generation when this context is switched in. */
static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { mm->context = 0; return 0; }

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/* * Destroy context related info for an mm_struct that is about * to be put to rest. */
static inline void destroy_context(struct mm_struct *mm) { }

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

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/* * After we have set current->mm to a new value, this activates * the context for the new mm so we see the new mappings. */ void activate_mm(struct mm_struct *prev, struct mm_struct *next); #endif /* _ASM_NIOS2_MMU_CONTEXT_H */

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