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gerrit-public.fairphone.software / kernel / msm-4.9 / 3c693024cffa5c96a20b969f4efd058675e7700f / . / include / linux / taskstats_kern.h
blob: 16894b7edcc8e137dc7d58b0869f03f27710d5df [file] [log] [blame]
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]1/* taskstats_kern.h - kernel header for per-task statistics interface
2 *
3 * Copyright (C) Shailabh Nagar, IBM Corp. 2006
4 * (C) Balbir Singh, IBM Corp. 2006
5 */
6
7#ifndef _LINUX_TASKSTATS_KERN_H
8#define _LINUX_TASKSTATS_KERN_H
9
10#include <linux/taskstats.h>
11#include <linux/sched.h>
Shailabh Nagarc8924362006-07-14 00:24:46 -0700[diff] [blame]12#include <net/genetlink.h>
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]13
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]14#ifdef CONFIG_TASKSTATS
15extern kmem_cache_t *taskstats_cache;
Shailabh Nagar6f449932006-07-14 00:24:41 -0700[diff] [blame]16extern struct mutex taskstats_exit_mutex;
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]17
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]18static inline void taskstats_exit_free(struct taskstats *tidstats)
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]19{
20 if (tidstats)
21 kmem_cache_free(taskstats_cache, tidstats);
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]22}
23
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]24static inline void taskstats_tgid_init(struct signal_struct *sig)
25{
26 spin_lock_init(&sig->stats_lock);
27 sig->stats = NULL;
28}
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]29
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]30static inline void taskstats_tgid_alloc(struct signal_struct *sig)
31{
32 struct taskstats *stats;
33 unsigned long flags;
34
35 stats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL);
36 if (!stats)
37 return;
38
39 spin_lock_irqsave(&sig->stats_lock, flags);
40 if (!sig->stats) {
41 sig->stats = stats;
42 stats = NULL;
43 }
44 spin_unlock_irqrestore(&sig->stats_lock, flags);
45
46 if (stats)
47 kmem_cache_free(taskstats_cache, stats);
48}
49
50static inline void taskstats_tgid_free(struct signal_struct *sig)
51{
52 struct taskstats *stats = NULL;
53 unsigned long flags;
54
55 spin_lock_irqsave(&sig->stats_lock, flags);
56 if (sig->stats) {
57 stats = sig->stats;
58 sig->stats = NULL;
59 }
60 spin_unlock_irqrestore(&sig->stats_lock, flags);
61 if (stats)
62 kmem_cache_free(taskstats_cache, stats);
63}
64
Shailabh Nagarf9fd8912006-07-14 00:24:47 -0700[diff] [blame]65extern void taskstats_exit_alloc(struct taskstats **, unsigned int *);
66extern void taskstats_exit_send(struct task_struct *, struct taskstats *, int, unsigned int);
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]67extern void taskstats_init_early(void);
68extern void taskstats_tgid_alloc(struct signal_struct *);
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]69#else
Shailabh Nagarf9fd8912006-07-14 00:24:47 -0700[diff] [blame]70static inline void taskstats_exit_alloc(struct taskstats **ptidstats, unsigned int *mycpu)
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]71{}
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]72static inline void taskstats_exit_free(struct taskstats *ptidstats)
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]73{}
74static inline void taskstats_exit_send(struct task_struct *tsk,
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]75 struct taskstats *tidstats,
Shailabh Nagarf9fd8912006-07-14 00:24:47 -0700[diff] [blame]76 int group_dead, unsigned int cpu)
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]77{}
78static inline void taskstats_tgid_init(struct signal_struct *sig)
79{}
80static inline void taskstats_tgid_alloc(struct signal_struct *sig)
81{}
82static inline void taskstats_tgid_free(struct signal_struct *sig)
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]83{}
84static inline void taskstats_init_early(void)
85{}
86#endif /* CONFIG_TASKSTATS */
87
88#endif
89