/* 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);
}
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);
}
EXPORT_SYMBOL_GPL(unuse_mm);
ption>
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<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=ca6d4480f87db9d9470d3d7bbe445953fa105e57'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=ca6d4480f87db9d9470d3d7bbe445953fa105e57'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc?h=nds-private-remove&amp;id=ca6d4480f87db9d9470d3d7bbe445953fa105e57'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs?h=nds-private-remove&amp;id=ca6d4480f87db9d9470d3d7bbe445953fa105e57'>codecs</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/wm8770.c?h=nds-private-remove&amp;id=ca6d4480f87db9d9470d3d7bbe445953fa105e57'>wm8770.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/wm8770.c?h=nds-private-remove&amp;id=ca6d4480f87db9d9470d3d7bbe445953fa105e57&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>