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gerrit-public.fairphone.software / kernel / msm-4.19 / 093a8e8aecd77b2799934996a55a6838e1e2b8f3 / . / include / linux / taskstats_kern.h
blob: a437ca0d226b1add22411dc7121527ba35da7f7e [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{
Oleg Nesterov093a8e82006-10-28 10:38:51 -0700[diff] [blame^]52 if (sig->stats)
53 kmem_cache_free(taskstats_cache, sig->stats);
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]54}
55
Shailabh Nagarf9fd8912006-07-14 00:24:47 -0700[diff] [blame]56extern void taskstats_exit_alloc(struct taskstats **, unsigned int *);
57extern void taskstats_exit_send(struct task_struct *, struct taskstats *, int, unsigned int);
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]58extern void taskstats_init_early(void);
59extern void taskstats_tgid_alloc(struct signal_struct *);
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]60#else
Shailabh Nagarf9fd8912006-07-14 00:24:47 -0700[diff] [blame]61static inline void taskstats_exit_alloc(struct taskstats **ptidstats, unsigned int *mycpu)
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]62{}
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]63static inline void taskstats_exit_free(struct taskstats *ptidstats)
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]64{}
65static inline void taskstats_exit_send(struct task_struct *tsk,
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]66 struct taskstats *tidstats,
Shailabh Nagarf9fd8912006-07-14 00:24:47 -0700[diff] [blame]67 int group_dead, unsigned int cpu)
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]68{}
69static inline void taskstats_tgid_init(struct signal_struct *sig)
70{}
71static inline void taskstats_tgid_alloc(struct signal_struct *sig)
72{}
73static inline void taskstats_tgid_free(struct signal_struct *sig)
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]74{}
75static inline void taskstats_init_early(void)
76{}
77#endif /* CONFIG_TASKSTATS */
78
79#endif
80