aboutsummaryrefslogtreecommitdiffstats
path: root/kernel/mutex-debug.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/mutex-debug.c')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-25 13:38:11 -0500
David Rientjes <rientjes@google.com> 2012-03-21 19:34:13 -0400 committer Linus Torvalds <torvalds@linux-foundation.org> 2012-03-21 20:54:59 -0400 mm, counters: remove task argument to sync_mm_rss() and __sync_task_rss_stat()' href='/cgit/cgit.cgi/litmus-rt-ext-res.git/commit/mm/mmu_context.c?id=05af2e104a0c282dcd9303431e1360750ba76de6'>05af2e104a0c 
3d2d827f5ca5





5da779c34ccf

1
2
3
4
5
6

7

8

9

10

11

12
13
14
15
16
17
18

19
20
21
22
23
24
25
26
27
28

29

30

31
32

33

34
35

36
37
38

39

40
41

42

43

44
45
46
47
48
49
50
51
52
53
54
55
56
57

58

59
60
61
62
63

64






                                      
                        
                           
                             
                              
                         






                                                             









                                                         
                              
                           

                                    
                     

                                      


                                       
 

                                  
 
                          













                                                         
                        




                                     
                            
/* 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);
}
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);
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-25 13:38:11 -0500