cregit-Linux how code gets into the kernel

Release 4.14 mm/mmu_context.c

Directory: mm
/* Copyright (C) 2009 Red Hat, Inc.
 *
 * See ../COPYING for licensing terms.
 */

#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/sched/mm.h>
#include <linux/sched/task.h>
#include <linux/mmu_context.h>
#include <linux/export.h>

#include <asm/mmu_context.h>

/*
 * use_mm
 *      Makes the calling kernel thread take on the specified
 *      mm context.
 *      (Note: this routine is intended to be called only
 *      from a kernel thread context)
 */

void use_mm(struct mm_struct *mm) { struct mm_struct *active_mm; struct task_struct *tsk = current; task_lock(tsk); active_mm = tsk->active_mm; if (active_mm != mm) { mmgrab(mm); tsk->active_mm = mm; } tsk->mm = mm; switch_mm(active_mm, mm, tsk); task_unlock(tsk); #ifdef finish_arch_post_lock_switch finish_arch_post_lock_switch(); #endif if (active_mm != mm) mmdrop(active_mm); }

Contributors

PersonTokensPropCommitsCommitProp
Michael S. Tsirkin8290.11%250.00%
Martin Schwidefsky88.79%125.00%
Vegard Nossum11.10%125.00%
Total91100.00%4100.00%

EXPORT_SYMBOL_GPL(use_mm); /* * unuse_mm * Reverses the effect of use_mm, i.e. releases the * specified mm context which was earlier taken on * by the calling kernel thread * (Note: this routine is intended to be called only * from a kernel thread context) */
void unuse_mm(struct mm_struct *mm) { struct task_struct *tsk = current; task_lock(tsk); sync_mm_rss(mm); tsk->mm = NULL; /* active_mm is still 'mm' */ enter_lazy_tlb(mm, tsk); task_unlock(tsk); }

Contributors

PersonTokensPropCommitsCommitProp
Michael S. Tsirkin46100.00%2100.00%
Total46100.00%2100.00%

EXPORT_SYMBOL_GPL(unuse_mm);

Overall Contributors

PersonTokensPropCommitsCommitProp
Michael S. Tsirkin15288.89%440.00%
Ingo Molnar95.26%330.00%
Martin Schwidefsky84.68%110.00%
Vegard Nossum10.58%110.00%
Zach Brown10.58%110.00%
Total171100.00%10100.00%
Directory: mm
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