1 files changed, 89 insertions, 0 deletions

diff --git a/include/linux/taskstats_kern.h b/include/linux/taskstats_kern.h
new file mode 100644
index 000000000000..16894b7edcc8
--- /dev/null
+++ b/include/linux/taskstats_kern.h
@@ -0,0 +1,89 @@
+/* taskstats_kern.h - kernel header for per-task statistics interface
+ *
+ * Copyright (C) Shailabh Nagar, IBM Corp. 2006
+ *           (C) Balbir Singh,   IBM Corp. 2006
+ */
+
+#ifndef _LINUX_TASKSTATS_KERN_H
+#define _LINUX_TASKSTATS_KERN_H
+
+#include <linux/taskstats.h>
+#include <linux/sched.h>
+#include <net/genetlink.h>
+
+#ifdef CONFIG_TASKSTATS
+extern kmem_cache_t *taskstats_cache;
+extern struct mutex taskstats_exit_mutex;
+
+static inline void taskstats_exit_free(struct taskstats *tidstats)
+{
+        if (tidstats)
+                kmem_cache_free(taskstats_cache, tidstats);
+}
+
+static inline void taskstats_tgid_init(struct signal_struct *sig)
+{
+        spin_lock_init(&sig->stats_lock);
+        sig->stats = NULL;
+}
+
+static inline void taskstats_tgid_alloc(struct signal_struct *sig)
+{
+        struct taskstats *stats;
+        unsigned long flags;
+
+        stats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL);
+        if (!stats)
+                return;
+
+        spin_lock_irqsave(&sig->stats_lock, flags);
+        if (!sig->stats) {
+                sig->stats = stats;
+                stats = NULL;
+        }
+        spin_unlock_irqrestore(&sig->stats_lock, flags);
+
+        if (stats)
+                kmem_cache_free(taskstats_cache, stats);
+}
+
+static inline void taskstats_tgid_free(struct signal_struct *sig)
+{
+        struct taskstats *stats = NULL;
+        unsigned long flags;
+
+        spin_lock_irqsave(&sig->stats_lock, flags);
+        if (sig->stats) {
+                stats = sig->stats;
+                sig->stats = NULL;
+        }
+        spin_unlock_irqrestore(&sig->stats_lock, flags);
+        if (stats)
+                kmem_cache_free(taskstats_cache, stats);
+}
+
+extern void taskstats_exit_alloc(struct taskstats **, unsigned int *);
+extern void taskstats_exit_send(struct task_struct *, struct taskstats *, int, unsigned int);
+extern void taskstats_init_early(void);
+extern void taskstats_tgid_alloc(struct signal_struct *);
+#else
+static inline void taskstats_exit_alloc(struct taskstats **ptidstats, unsigned int *mycpu)
+{}
+static inline void taskstats_exit_free(struct taskstats *ptidstats)
+{}
+static inline void taskstats_exit_send(struct task_struct *tsk,
+                                       struct taskstats *tidstats,
+                                       int group_dead, unsigned int cpu)
+{}
+static inline void taskstats_tgid_init(struct signal_struct *sig)
+{}
+static inline void taskstats_tgid_alloc(struct signal_struct *sig)
+{}
+static inline void taskstats_tgid_free(struct signal_struct *sig)
+{}
+static inline void taskstats_init_early(void)
+{}
+#endif /* CONFIG_TASKSTATS */
+
+#endif
+