Release 4.9 mm/mmu_context.c

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

#include <linux/mm.h>
#include <linux/sched.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) {
		atomic_inc(&mm->mm_count);
		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
Person
Tokens
Prop
Commits
CommitProp
michael s. tsirkin
michael s. tsirkin
86
91.49%
2
66.67%
martin schwidefsky
martin schwidefsky
8
8.51%
1
33.33%
Total
94
100.00%
3
100.00%


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
Person
Tokens
Prop
Commits
CommitProp
michael s. tsirkin
michael s. tsirkin
46
100.00%
2
100.00%
Total
46
100.00%
2
100.00%


EXPORT_SYMBOL_GPL(unuse_mm);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
michael s. tsirkin
michael s. tsirkin
156
92.86%
4
57.14%
martin schwidefsky
martin schwidefsky
8
4.76%
1
14.29%
ingo molnar
ingo molnar
3
1.79%
1
14.29%
zach brown
zach brown
1
0.60%
1
14.29%
Total
168
100.00%
7
100.00%
  
Directory: mm