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gerrit-public.fairphone.software / kernel / msm-4.9 / 2b577f1f14c8d83ba9400ec8accaf4a208f4f36a / . / include / linux / taskstats_kern.h
blob: 6562a2050a25a6c0d5762b338d80ea8e1c81d476 [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{
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]26 sig->stats = NULL;
27}
Shailabh Nagarc7572492006-07-14 00:24:40 -0700[diff] [blame]28
Oleg Nesterovb8534d72006-10-28 10:38:53 -0700[diff] [blame]29static inline void taskstats_tgid_alloc(struct task_struct *tsk)
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]30{
Oleg Nesterovb8534d72006-10-28 10:38:53 -0700[diff] [blame]31 struct signal_struct *sig = tsk->signal;
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]32 struct taskstats *stats;
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]33
Oleg Nesterov17b02692006-10-28 10:38:52 -0700[diff] [blame]34 if (sig->stats != NULL)
35 return;
36
Oleg Nesterovb8534d72006-10-28 10:38:53 -0700[diff] [blame]37 /* No problem if kmem_cache_zalloc() fails */
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]38 stats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL);
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]39
Oleg Nesterovb8534d72006-10-28 10:38:53 -0700[diff] [blame]40 spin_lock_irq(&tsk->sighand->siglock);
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]41 if (!sig->stats) {
42 sig->stats = stats;
43 stats = NULL;
44 }
Oleg Nesterovb8534d72006-10-28 10:38:53 -0700[diff] [blame]45 spin_unlock_irq(&tsk->sighand->siglock);
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]46
47 if (stats)
48 kmem_cache_free(taskstats_cache, stats);
49}
50
51static inline void taskstats_tgid_free(struct signal_struct *sig)
52{
Oleg Nesterov093a8e82006-10-28 10:38:51 -0700[diff] [blame]53 if (sig->stats)
54 kmem_cache_free(taskstats_cache, sig->stats);
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]55}
56
Shailabh Nagarf9fd8912006-07-14 00:24:47 -0700[diff] [blame]57extern void taskstats_exit_alloc(struct taskstats **, unsigned int *);
58extern void taskstats_exit_send(struct task_struct *, struct taskstats *, int, unsigned int);
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]59extern void taskstats_init_early(void);
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{}
Oleg Nesterovb8534d72006-10-28 10:38:53 -0700[diff] [blame]71static inline void taskstats_tgid_alloc(struct task_struct *tsk)
Shailabh Nagarad4ecbc2006-07-14 00:24:44 -0700[diff] [blame]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