tracing: consolidate trace and trace_event headers

Impact: clean up

Neil Horman (et. al.) criticized the way the trace events were broken up
into two files. The reason for that was that ftrace needed to separate out
the declarations from where the #include <linux/tracepoint.h> was used.
It then dawned on me that the tracepoint.h header only needs to define the
TRACE_EVENT macro if it is not already defined.

The solution is simply to test if TRACE_EVENT is defined, and if it is not
then the linux/tracepoint.h header can define it. This change consolidates
all the <traces>.h and <traces>_event_types.h into the <traces>.h file.
Reported-by: Neil Horman <nhorman@tuxdriver.com>
Reported-by: Theodore Tso <tytso@mit.edu>
Reported-by: Jiaying Zhang <jiayingz@google.com>
Cc: Zhaolei <zhaolei@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

include/linux/tracepoint.h

@@ -31,6 +31,8 @@ struct tracepoint {
 					 * Keep in sync with vmlinux.lds.h.
 					 */
 
+#ifndef DECLARE_TRACE
+
 #define TP_PROTO(args...)	args
 #define TP_ARGS(args...)		args
 
@@ -114,6 +116,7 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
 	struct tracepoint *end)
 { }
 #endif /* CONFIG_TRACEPOINTS */
+#endif /* DECLARE_TRACE */
 
 /*
  * Connect a probe to a tracepoint.
@@ -154,10 +157,13 @@ static inline void tracepoint_synchronize_unregister(void)
 }
 
 #define PARAMS(args...) args
+
+#ifndef TRACE_FORMAT
 #define TRACE_FORMAT(name, proto, args, fmt)		\
 	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
+#endif
 
-
+#ifndef TRACE_EVENT
 /*
  * For use with the TRACE_EVENT macro:
  *
@@ -262,5 +268,6 @@ static inline void tracepoint_synchronize_unregister(void)
 
 #define TRACE_EVENT(name, proto, args, struct, assign, print)	\
 	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
+#endif
 
 #endif

include/trace/irq.h

-#ifndef _TRACE_IRQ_H
+#if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
 #define _TRACE_IRQ_H
 
-#include <linux/interrupt.h>
 #include <linux/tracepoint.h>
+#include <linux/interrupt.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM irq
+
+/*
+ * Tracepoint for entry of interrupt handler:
+ */
+TRACE_FORMAT(irq_handler_entry,
+	TP_PROTO(int irq, struct irqaction *action),
+	TP_ARGS(irq, action),
+	TP_FMT("irq=%d handler=%s", irq, action->name)
+	);
+
+/*
+ * Tracepoint for return of an interrupt handler:
+ */
+TRACE_EVENT(irq_handler_exit,
+
+	TP_PROTO(int irq, struct irqaction *action, int ret),
+
+	TP_ARGS(irq, action, ret),
+
+	TP_STRUCT__entry(
+		__field(	int,	irq	)
+		__field(	int,	ret	)
+	),
+
+	TP_fast_assign(
+		__entry->irq	= irq;
+		__entry->ret	= ret;
+	),
+
+	TP_printk("irq=%d return=%s",
+		  __entry->irq, __entry->ret ? "handled" : "unhandled")
+);
+
+TRACE_FORMAT(softirq_entry,
+	TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
+	TP_ARGS(h, vec),
+	TP_FMT("softirq=%d action=%s", (int)(h - vec), softirq_to_name[h-vec])
+	);
 
-#include <trace/irq_event_types.h>
+TRACE_FORMAT(softirq_exit,
+	TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
+	TP_ARGS(h, vec),
+	TP_FMT("softirq=%d action=%s", (int)(h - vec), softirq_to_name[h-vec])
+	);
 
 #endif

include/trace/irq_event_types.h

-
-/* use <trace/irq.h> instead */
-#ifndef TRACE_FORMAT
-# error Do not include this file directly.
-# error Unless you know what you are doing.
-#endif
-
-#undef TRACE_SYSTEM
-#define TRACE_SYSTEM irq
-
-/*
- * Tracepoint for entry of interrupt handler:
- */
-TRACE_FORMAT(irq_handler_entry,
-	TP_PROTO(int irq, struct irqaction *action),
-	TP_ARGS(irq, action),
-	TP_FMT("irq=%d handler=%s", irq, action->name)
-	);
-
-/*
- * Tracepoint for return of an interrupt handler:
- */
-TRACE_EVENT(irq_handler_exit,
-
-	TP_PROTO(int irq, struct irqaction *action, int ret),
-
-	TP_ARGS(irq, action, ret),
-
-	TP_STRUCT__entry(
-		__field(	int,	irq	)
-		__field(	int,	ret	)
-	),
-
-	TP_fast_assign(
-		__entry->irq	= irq;
-		__entry->ret	= ret;
-	),
-
-	TP_printk("irq=%d return=%s",
-		  __entry->irq, __entry->ret ? "handled" : "unhandled")
-);
-
-TRACE_FORMAT(softirq_entry,
-	TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
-	TP_ARGS(h, vec),
-	TP_FMT("softirq=%d action=%s", (int)(h - vec), softirq_to_name[h-vec])
-	);
-
-TRACE_FORMAT(softirq_exit,
-	TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
-	TP_ARGS(h, vec),
-	TP_FMT("softirq=%d action=%s", (int)(h - vec), softirq_to_name[h-vec])
-	);
-
-#undef TRACE_SYSTEM

include/trace/kmem.h

-#ifndef _TRACE_KMEM_H
+#if !defined(_TRACE_KMEM_H) || defined(TRACE_HEADER_MULTI_READ)
 #define _TRACE_KMEM_H
 
 #include <linux/types.h>
 #include <linux/tracepoint.h>
 
-#include <trace/kmem_event_types.h>
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM kmem
 
-#endif /* _TRACE_KMEM_H */
+TRACE_EVENT(kmalloc,
+
+	TP_PROTO(unsigned long call_site,
+		 const void *ptr,
+		 size_t bytes_req,
+		 size_t bytes_alloc,
+		 gfp_t gfp_flags),
+
+	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	call_site	)
+		__field(	const void *,	ptr		)
+		__field(	size_t,		bytes_req	)
+		__field(	size_t,		bytes_alloc	)
+		__field(	gfp_t,		gfp_flags	)
+	),
+
+	TP_fast_assign(
+		__entry->call_site	= call_site;
+		__entry->ptr		= ptr;
+		__entry->bytes_req	= bytes_req;
+		__entry->bytes_alloc	= bytes_alloc;
+		__entry->gfp_flags	= gfp_flags;
+	),
+
+	TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%08x",
+		__entry->call_site,
+		__entry->ptr,
+		__entry->bytes_req,
+		__entry->bytes_alloc,
+		__entry->gfp_flags)
+);
+
+TRACE_EVENT(kmem_cache_alloc,
+
+	TP_PROTO(unsigned long call_site,
+		 const void *ptr,
+		 size_t bytes_req,
+		 size_t bytes_alloc,
+		 gfp_t gfp_flags),
+
+	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	call_site	)
+		__field(	const void *,	ptr		)
+		__field(	size_t,		bytes_req	)
+		__field(	size_t,		bytes_alloc	)
+		__field(	gfp_t,		gfp_flags	)
+	),
+
+	TP_fast_assign(
+		__entry->call_site	= call_site;
+		__entry->ptr		= ptr;
+		__entry->bytes_req	= bytes_req;
+		__entry->bytes_alloc	= bytes_alloc;
+		__entry->gfp_flags	= gfp_flags;
+	),
+
+	TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%08x",
+		__entry->call_site,
+		__entry->ptr,
+		__entry->bytes_req,
+		__entry->bytes_alloc,
+		__entry->gfp_flags)
+);
+
+TRACE_EVENT(kmalloc_node,
+
+	TP_PROTO(unsigned long call_site,
+		 const void *ptr,
+		 size_t bytes_req,
+		 size_t bytes_alloc,
+		 gfp_t gfp_flags,
+		 int node),
+
+	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	call_site	)
+		__field(	const void *,	ptr		)
+		__field(	size_t,		bytes_req	)
+		__field(	size_t,		bytes_alloc	)
+		__field(	gfp_t,		gfp_flags	)
+		__field(	int,		node		)
+	),
+
+	TP_fast_assign(
+		__entry->call_site	= call_site;
+		__entry->ptr		= ptr;
+		__entry->bytes_req	= bytes_req;
+		__entry->bytes_alloc	= bytes_alloc;
+		__entry->gfp_flags	= gfp_flags;
+		__entry->node		= node;
+	),
+
+	TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%08x node=%d",
+		__entry->call_site,
+		__entry->ptr,
+		__entry->bytes_req,
+		__entry->bytes_alloc,
+		__entry->gfp_flags,
+		__entry->node)
+);
+
+TRACE_EVENT(kmem_cache_alloc_node,
+
+	TP_PROTO(unsigned long call_site,
+		 const void *ptr,
+		 size_t bytes_req,
+		 size_t bytes_alloc,
+		 gfp_t gfp_flags,
+		 int node),
+
+	TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	call_site	)
+		__field(	const void *,	ptr		)
+		__field(	size_t,		bytes_req	)
+		__field(	size_t,		bytes_alloc	)
+		__field(	gfp_t,		gfp_flags	)
+		__field(	int,		node		)
+	),
+
+	TP_fast_assign(
+		__entry->call_site	= call_site;
+		__entry->ptr		= ptr;
+		__entry->bytes_req	= bytes_req;
+		__entry->bytes_alloc	= bytes_alloc;
+		__entry->gfp_flags	= gfp_flags;
+		__entry->node		= node;
+	),
+
+	TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%08x node=%d",
+		__entry->call_site,
+		__entry->ptr,
+		__entry->bytes_req,
+		__entry->bytes_alloc,
+		__entry->gfp_flags,
+		__entry->node)
+);
+
+TRACE_EVENT(kfree,
+
+	TP_PROTO(unsigned long call_site, const void *ptr),
+
+	TP_ARGS(call_site, ptr),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	call_site	)
+		__field(	const void *,	ptr		)
+	),
+
+	TP_fast_assign(
+		__entry->call_site	= call_site;
+		__entry->ptr		= ptr;
+	),
+
+	TP_printk("call_site=%lx ptr=%p", __entry->call_site, __entry->ptr)
+);
+
+TRACE_EVENT(kmem_cache_free,
+
+	TP_PROTO(unsigned long call_site, const void *ptr),
+
+	TP_ARGS(call_site, ptr),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	call_site	)
+		__field(	const void *,	ptr		)
+	),
+
+	TP_fast_assign(
+		__entry->call_site	= call_site;
+		__entry->ptr		= ptr;
+	),
+
+	TP_printk("call_site=%lx ptr=%p", __entry->call_site, __entry->ptr)
+);
+
+#endif

include/trace/lockdep.h

-#ifndef _TRACE_LOCKDEP_H
+#if !defined(_TRACE_LOCKDEP_H) || defined(TRACE_HEADER_MULTI_READ)
 #define _TRACE_LOCKDEP_H
 
 #include <linux/lockdep.h>
 #include <linux/tracepoint.h>
 
-#include <trace/lockdep_event_types.h>
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM lock
+
+#ifdef CONFIG_LOCKDEP
+
+TRACE_FORMAT(lock_acquire,
+	TP_PROTO(struct lockdep_map *lock, unsigned int subclass,
+		int trylock, int read, int check,
+		struct lockdep_map *next_lock, unsigned long ip),
+	TP_ARGS(lock, subclass, trylock, read, check, next_lock, ip),
+	TP_FMT("%s%s%s", trylock ? "try " : "",
+		read ? "read " : "", lock->name)
+	);
+
+TRACE_FORMAT(lock_release,
+	TP_PROTO(struct lockdep_map *lock, int nested, unsigned long ip),
+	TP_ARGS(lock, nested, ip),
+	TP_FMT("%s", lock->name)
+	);
+
+#ifdef CONFIG_LOCK_STAT
+
+TRACE_FORMAT(lock_contended,
+	TP_PROTO(struct lockdep_map *lock, unsigned long ip),
+	TP_ARGS(lock, ip),
+	TP_FMT("%s", lock->name)
+	);
+
+TRACE_EVENT(lock_acquired,
+	TP_PROTO(struct lockdep_map *lock, unsigned long ip, s64 waittime),
+
+	TP_ARGS(lock, ip, waittime),
+
+	TP_STRUCT__entry(
+		__field(const char *, name)
+		__field(unsigned long, wait_usec)
+		__field(unsigned long, wait_nsec_rem)
+	),
+	TP_fast_assign(
+		__entry->name = lock->name;
+		__entry->wait_nsec_rem = do_div(waittime, NSEC_PER_USEC);
+		__entry->wait_usec = (unsigned long) waittime;
+	),
+	TP_printk("%s (%lu.%03lu us)", __entry->name, __entry->wait_usec,
+				       __entry->wait_nsec_rem)
+);
 
 #endif
+#endif
+
+#endif /* _TRACE_LOCKDEP_H */

include/trace/lockdep_event_types.h

-
-#ifndef TRACE_FORMAT
-# error Do not include this file directly.
-# error Unless you know what you are doing.
-#endif
-
-#undef TRACE_SYSTEM
-#define TRACE_SYSTEM lock
-
-#ifdef CONFIG_LOCKDEP
-
-TRACE_FORMAT(lock_acquire,
-	TP_PROTO(struct lockdep_map *lock, unsigned int subclass,
-		int trylock, int read, int check,
-		struct lockdep_map *next_lock, unsigned long ip),
-	TP_ARGS(lock, subclass, trylock, read, check, next_lock, ip),
-	TP_FMT("%s%s%s", trylock ? "try " : "",
-		read ? "read " : "", lock->name)
-	);
-
-TRACE_FORMAT(lock_release,
-	TP_PROTO(struct lockdep_map *lock, int nested, unsigned long ip),
-	TP_ARGS(lock, nested, ip),
-	TP_FMT("%s", lock->name)
-	);
-
-#ifdef CONFIG_LOCK_STAT
-
-TRACE_FORMAT(lock_contended,
-	TP_PROTO(struct lockdep_map *lock, unsigned long ip),
-	TP_ARGS(lock, ip),
-	TP_FMT("%s", lock->name)
-	);
-
-TRACE_EVENT(lock_acquired,
-	TP_PROTO(struct lockdep_map *lock, unsigned long ip, s64 waittime),
-
-	TP_ARGS(lock, ip, waittime),
-
-	TP_STRUCT__entry(
-		__field(const char *, name)
-		__field(unsigned long, wait_usec)
-		__field(unsigned long, wait_nsec_rem)
-	),
-	TP_fast_assign(
-		__entry->name = lock->name;
-		__entry->wait_nsec_rem = do_div(waittime, NSEC_PER_USEC);
-		__entry->wait_usec = (unsigned long) waittime;
-	),
-	TP_printk("%s (%lu.%03lu us)", __entry->name, __entry->wait_usec,
-				       __entry->wait_nsec_rem)
-);
-
-#endif
-#endif
-
-#undef TRACE_SYSTEM

include/trace/sched.h

-#ifndef _TRACE_SCHED_H
+#if !defined(_TRACE_SCHED_H) || defined(TRACE_HEADER_MULTI_READ)
 #define _TRACE_SCHED_H
 
 #include <linux/sched.h>
 #include <linux/tracepoint.h>
 
-#include <trace/sched_event_types.h>
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM sched
 
-#endif
+/*
+ * Tracepoint for calling kthread_stop, performed to end a kthread:
+ */
+TRACE_EVENT(sched_kthread_stop,
+
+	TP_PROTO(struct task_struct *t),
+
+	TP_ARGS(t),
+
+	TP_STRUCT__entry(
+		__array(	char,	comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	pid			)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->comm, t->comm, TASK_COMM_LEN);
+		__entry->pid	= t->pid;
+	),
+
+	TP_printk("task %s:%d", __entry->comm, __entry->pid)
+);
+
+/*
+ * Tracepoint for the return value of the kthread stopping:
+ */
+TRACE_EVENT(sched_kthread_stop_ret,
+
+	TP_PROTO(int ret),
+
+	TP_ARGS(ret),
+
+	TP_STRUCT__entry(
+		__field(	int,	ret	)
+	),
+
+	TP_fast_assign(
+		__entry->ret	= ret;
+	),
+
+	TP_printk("ret %d", __entry->ret)
+);
+
+/*
+ * Tracepoint for waiting on task to unschedule:
+ *
+ * (NOTE: the 'rq' argument is not used by generic trace events,
+ *        but used by the latency tracer plugin. )
+ */
+TRACE_EVENT(sched_wait_task,
+
+	TP_PROTO(struct rq *rq, struct task_struct *p),
+
+	TP_ARGS(rq, p),
+
+	TP_STRUCT__entry(
+		__array(	char,	comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	pid			)
+		__field(	int,	prio			)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
+		__entry->pid	= p->pid;
+		__entry->prio	= p->prio;
+	),
+
+	TP_printk("task %s:%d [%d]",
+		  __entry->comm, __entry->pid, __entry->prio)
+);
+
+/*
+ * Tracepoint for waking up a task:
+ *
+ * (NOTE: the 'rq' argument is not used by generic trace events,
+ *        but used by the latency tracer plugin. )
+ */
+TRACE_EVENT(sched_wakeup,
+
+	TP_PROTO(struct rq *rq, struct task_struct *p, int success),
+
+	TP_ARGS(rq, p, success),
+
+	TP_STRUCT__entry(
+		__array(	char,	comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	pid			)
+		__field(	int,	prio			)
+		__field(	int,	success			)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
+		__entry->pid		= p->pid;
+		__entry->prio		= p->prio;
+		__entry->success	= success;
+	),
+
+	TP_printk("task %s:%d [%d] success=%d",
+		  __entry->comm, __entry->pid, __entry->prio,
+		  __entry->success)
+);
+
+/*
+ * Tracepoint for waking up a new task:
+ *
+ * (NOTE: the 'rq' argument is not used by generic trace events,
+ *        but used by the latency tracer plugin. )
+ */
+TRACE_EVENT(sched_wakeup_new,
+
+	TP_PROTO(struct rq *rq, struct task_struct *p, int success),
+
+	TP_ARGS(rq, p, success),
+
+	TP_STRUCT__entry(
+		__array(	char,	comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	pid			)
+		__field(	int,	prio			)
+		__field(	int,	success			)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
+		__entry->pid		= p->pid;
+		__entry->prio		= p->prio;
+		__entry->success	= success;
+	),
+
+	TP_printk("task %s:%d [%d] success=%d",
+		  __entry->comm, __entry->pid, __entry->prio,
+		  __entry->success)
+);
+
+/*
+ * Tracepoint for task switches, performed by the scheduler:
+ *
+ * (NOTE: the 'rq' argument is not used by generic trace events,
+ *        but used by the latency tracer plugin. )
+ */
+TRACE_EVENT(sched_switch,
+
+	TP_PROTO(struct rq *rq, struct task_struct *prev,
+		 struct task_struct *next),
+
+	TP_ARGS(rq, prev, next),
+
+	TP_STRUCT__entry(
+		__array(	char,	prev_comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	prev_pid			)
+		__field(	int,	prev_prio			)
+		__array(	char,	next_comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	next_pid			)
+		__field(	int,	next_prio			)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->next_comm, next->comm, TASK_COMM_LEN);
+		__entry->prev_pid	= prev->pid;
+		__entry->prev_prio	= prev->prio;
+		memcpy(__entry->prev_comm, prev->comm, TASK_COMM_LEN);
+		__entry->next_pid	= next->pid;
+		__entry->next_prio	= next->prio;
+	),
+
+	TP_printk("task %s:%d [%d] ==> %s:%d [%d]",
+		__entry->prev_comm, __entry->prev_pid, __entry->prev_prio,
+		__entry->next_comm, __entry->next_pid, __entry->next_prio)
+);
+
+/*
+ * Tracepoint for a task being migrated:
+ */
+TRACE_EVENT(sched_migrate_task,
+
+	TP_PROTO(struct task_struct *p, int orig_cpu, int dest_cpu),
+
+	TP_ARGS(p, orig_cpu, dest_cpu),
+
+	TP_STRUCT__entry(
+		__array(	char,	comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	pid			)
+		__field(	int,	prio			)
+		__field(	int,	orig_cpu		)
+		__field(	int,	dest_cpu		)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
+		__entry->pid		= p->pid;
+		__entry->prio		= p->prio;
+		__entry->orig_cpu	= orig_cpu;
+		__entry->dest_cpu	= dest_cpu;
+	),
+
+	TP_printk("task %s:%d [%d] from: %d  to: %d",
+		  __entry->comm, __entry->pid, __entry->prio,
+		  __entry->orig_cpu, __entry->dest_cpu)
+);
+
+/*
+ * Tracepoint for freeing a task:
+ */
+TRACE_EVENT(sched_process_free,
+
+	TP_PROTO(struct task_struct *p),
+
+	TP_ARGS(p),
+
+	TP_STRUCT__entry(
+		__array(	char,	comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	pid			)
+		__field(	int,	prio			)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
+		__entry->pid		= p->pid;
+		__entry->prio		= p->prio;
+	),
+
+	TP_printk("task %s:%d [%d]",
+		  __entry->comm, __entry->pid, __entry->prio)
+);
+
+/*
+ * Tracepoint for a task exiting:
+ */
+TRACE_EVENT(sched_process_exit,
+
+	TP_PROTO(struct task_struct *p),
+
+	TP_ARGS(p),
+
+	TP_STRUCT__entry(
+		__array(	char,	comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	pid			)
+		__field(	int,	prio			)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
+		__entry->pid		= p->pid;
+		__entry->prio		= p->prio;
+	),
+
+	TP_printk("task %s:%d [%d]",
+		  __entry->comm, __entry->pid, __entry->prio)
+);
+
+/*
+ * Tracepoint for a waiting task:
+ */
+TRACE_EVENT(sched_process_wait,
+
+	TP_PROTO(struct pid *pid),
+
+	TP_ARGS(pid),
+
+	TP_STRUCT__entry(
+		__array(	char,	comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	pid			)
+		__field(	int,	prio			)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
+		__entry->pid		= pid_nr(pid);
+		__entry->prio		= current->prio;
+	),
+
+	TP_printk("task %s:%d [%d]",
+		  __entry->comm, __entry->pid, __entry->prio)
+);
+
+/*
+ * Tracepoint for do_fork:
+ */
+TRACE_EVENT(sched_process_fork,
+
+	TP_PROTO(struct task_struct *parent, struct task_struct *child),
+
+	TP_ARGS(parent, child),
+
+	TP_STRUCT__entry(
+		__array(	char,	parent_comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	parent_pid			)
+		__array(	char,	child_comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	child_pid			)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->parent_comm, parent->comm, TASK_COMM_LEN);
+		__entry->parent_pid	= parent->pid;
+		memcpy(__entry->child_comm, child->comm, TASK_COMM_LEN);
+		__entry->child_pid	= child->pid;
+	),
+
+	TP_printk("parent %s:%d  child %s:%d",
+		__entry->parent_comm, __entry->parent_pid,
+		__entry->child_comm, __entry->child_pid)
+);
+
+/*
+ * Tracepoint for sending a signal:
+ */
+TRACE_EVENT(sched_signal_send,
+
+	TP_PROTO(int sig, struct task_struct *p),
+
+	TP_ARGS(sig, p),
+
+	TP_STRUCT__entry(
+		__field(	int,	sig			)
+		__array(	char,	comm,	TASK_COMM_LEN	)
+		__field(	pid_t,	pid			)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
+		__entry->pid	= p->pid;
+		__entry->sig	= sig;
+	),
+
+	TP_printk("sig: %d  task %s:%d",
+		  __entry->sig, __entry->comm, __entry->pid)
+);
+
+#endif /* _TRACE_SCHED_H */

include/trace/sched_event_types.h

-
-/* use <trace/sched.h> instead */
-#ifndef TRACE_EVENT
-# error Do not include this file directly.
-# error Unless you know what you are doing.
-#endif
-
-#undef TRACE_SYSTEM
-#define TRACE_SYSTEM sched
-
-/*
- * Tracepoint for calling kthread_stop, performed to end a kthread:
- */
-TRACE_EVENT(sched_kthread_stop,
-
-	TP_PROTO(struct task_struct *t),
-
-	TP_ARGS(t),
-
-	TP_STRUCT__entry(
-		__array(	char,	comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	pid			)
-	),
-
-	TP_fast_assign(
-		memcpy(__entry->comm, t->comm, TASK_COMM_LEN);
-		__entry->pid	= t->pid;
-	),
-
-	TP_printk("task %s:%d", __entry->comm, __entry->pid)
-);
-
-/*
- * Tracepoint for the return value of the kthread stopping:
- */
-TRACE_EVENT(sched_kthread_stop_ret,
-
-	TP_PROTO(int ret),
-
-	TP_ARGS(ret),
-
-	TP_STRUCT__entry(
-		__field(	int,	ret	)
-	),
-
-	TP_fast_assign(
-		__entry->ret	= ret;
-	),
-
-	TP_printk("ret %d", __entry->ret)
-);
-
-/*
- * Tracepoint for waiting on task to unschedule:
- *
- * (NOTE: the 'rq' argument is not used by generic trace events,
- *        but used by the latency tracer plugin. )
- */
-TRACE_EVENT(sched_wait_task,
-
-	TP_PROTO(struct rq *rq, struct task_struct *p),
-
-	TP_ARGS(rq, p),
-
-	TP_STRUCT__entry(
-		__array(	char,	comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	pid			)
-		__field(	int,	prio			)
-	),
-
-	TP_fast_assign(
-		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
-		__entry->pid	= p->pid;
-		__entry->prio	= p->prio;
-	),
-
-	TP_printk("task %s:%d [%d]",
-		  __entry->comm, __entry->pid, __entry->prio)
-);
-
-/*
- * Tracepoint for waking up a task:
- *
- * (NOTE: the 'rq' argument is not used by generic trace events,
- *        but used by the latency tracer plugin. )
- */
-TRACE_EVENT(sched_wakeup,
-
-	TP_PROTO(struct rq *rq, struct task_struct *p, int success),
-
-	TP_ARGS(rq, p, success),
-
-	TP_STRUCT__entry(
-		__array(	char,	comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	pid			)
-		__field(	int,	prio			)
-		__field(	int,	success			)
-	),
-
-	TP_fast_assign(
-		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
-		__entry->pid		= p->pid;
-		__entry->prio		= p->prio;
-		__entry->success	= success;
-	),
-
-	TP_printk("task %s:%d [%d] success=%d",
-		  __entry->comm, __entry->pid, __entry->prio,
-		  __entry->success)
-);
-
-/*
- * Tracepoint for waking up a new task:
- *
- * (NOTE: the 'rq' argument is not used by generic trace events,
- *        but used by the latency tracer plugin. )
- */
-TRACE_EVENT(sched_wakeup_new,
-
-	TP_PROTO(struct rq *rq, struct task_struct *p, int success),
-
-	TP_ARGS(rq, p, success),
-
-	TP_STRUCT__entry(
-		__array(	char,	comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	pid			)
-		__field(	int,	prio			)
-		__field(	int,	success			)
-	),
-
-	TP_fast_assign(
-		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
-		__entry->pid		= p->pid;
-		__entry->prio		= p->prio;
-		__entry->success	= success;
-	),
-
-	TP_printk("task %s:%d [%d] success=%d",
-		  __entry->comm, __entry->pid, __entry->prio,
-		  __entry->success)
-);
-
-/*
- * Tracepoint for task switches, performed by the scheduler:
- *
- * (NOTE: the 'rq' argument is not used by generic trace events,
- *        but used by the latency tracer plugin. )
- */
-TRACE_EVENT(sched_switch,
-
-	TP_PROTO(struct rq *rq, struct task_struct *prev,
-		 struct task_struct *next),
-
-	TP_ARGS(rq, prev, next),
-
-	TP_STRUCT__entry(
-		__array(	char,	prev_comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	prev_pid			)
-		__field(	int,	prev_prio			)
-		__array(	char,	next_comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	next_pid			)
-		__field(	int,	next_prio			)
-	),
-
-	TP_fast_assign(
-		memcpy(__entry->next_comm, next->comm, TASK_COMM_LEN);
-		__entry->prev_pid	= prev->pid;
-		__entry->prev_prio	= prev->prio;
-		memcpy(__entry->prev_comm, prev->comm, TASK_COMM_LEN);
-		__entry->next_pid	= next->pid;
-		__entry->next_prio	= next->prio;
-	),
-
-	TP_printk("task %s:%d [%d] ==> %s:%d [%d]",
-		__entry->prev_comm, __entry->prev_pid, __entry->prev_prio,
-		__entry->next_comm, __entry->next_pid, __entry->next_prio)
-);
-
-/*
- * Tracepoint for a task being migrated:
- */
-TRACE_EVENT(sched_migrate_task,
-
-	TP_PROTO(struct task_struct *p, int orig_cpu, int dest_cpu),
-
-	TP_ARGS(p, orig_cpu, dest_cpu),
-
-	TP_STRUCT__entry(
-		__array(	char,	comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	pid			)
-		__field(	int,	prio			)
-		__field(	int,	orig_cpu		)
-		__field(	int,	dest_cpu		)
-	),
-
-	TP_fast_assign(
-		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
-		__entry->pid		= p->pid;
-		__entry->prio		= p->prio;
-		__entry->orig_cpu	= orig_cpu;
-		__entry->dest_cpu	= dest_cpu;
-	),
-
-	TP_printk("task %s:%d [%d] from: %d  to: %d",
-		  __entry->comm, __entry->pid, __entry->prio,
-		  __entry->orig_cpu, __entry->dest_cpu)
-);
-
-/*
- * Tracepoint for freeing a task:
- */
-TRACE_EVENT(sched_process_free,
-
-	TP_PROTO(struct task_struct *p),
-
-	TP_ARGS(p),
-
-	TP_STRUCT__entry(
-		__array(	char,	comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	pid			)
-		__field(	int,	prio			)
-	),
-
-	TP_fast_assign(
-		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
-		__entry->pid		= p->pid;
-		__entry->prio		= p->prio;
-	),
-
-	TP_printk("task %s:%d [%d]",
-		  __entry->comm, __entry->pid, __entry->prio)
-);
-
-/*
- * Tracepoint for a task exiting:
- */
-TRACE_EVENT(sched_process_exit,
-
-	TP_PROTO(struct task_struct *p),
-
-	TP_ARGS(p),
-
-	TP_STRUCT__entry(
-		__array(	char,	comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	pid			)
-		__field(	int,	prio			)
-	),
-
-	TP_fast_assign(
-		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
-		__entry->pid		= p->pid;
-		__entry->prio		= p->prio;
-	),
-
-	TP_printk("task %s:%d [%d]",
-		  __entry->comm, __entry->pid, __entry->prio)
-);
-
-/*
- * Tracepoint for a waiting task:
- */
-TRACE_EVENT(sched_process_wait,
-
-	TP_PROTO(struct pid *pid),
-
-	TP_ARGS(pid),
-
-	TP_STRUCT__entry(
-		__array(	char,	comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	pid			)
-		__field(	int,	prio			)
-	),
-
-	TP_fast_assign(
-		memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
-		__entry->pid		= pid_nr(pid);
-		__entry->prio		= current->prio;
-	),
-
-	TP_printk("task %s:%d [%d]",
-		  __entry->comm, __entry->pid, __entry->prio)
-);
-
-/*
- * Tracepoint for do_fork:
- */
-TRACE_EVENT(sched_process_fork,
-
-	TP_PROTO(struct task_struct *parent, struct task_struct *child),
-
-	TP_ARGS(parent, child),
-
-	TP_STRUCT__entry(
-		__array(	char,	parent_comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	parent_pid			)
-		__array(	char,	child_comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	child_pid			)
-	),
-
-	TP_fast_assign(
-		memcpy(__entry->parent_comm, parent->comm, TASK_COMM_LEN);
-		__entry->parent_pid	= parent->pid;
-		memcpy(__entry->child_comm, child->comm, TASK_COMM_LEN);
-		__entry->child_pid	= child->pid;
-	),
-
-	TP_printk("parent %s:%d  child %s:%d",
-		__entry->parent_comm, __entry->parent_pid,
-		__entry->child_comm, __entry->child_pid)
-);
-
-/*
- * Tracepoint for sending a signal:
- */
-TRACE_EVENT(sched_signal_send,
-
-	TP_PROTO(int sig, struct task_struct *p),
-
-	TP_ARGS(sig, p),
-
-	TP_STRUCT__entry(
-		__field(	int,	sig			)
-		__array(	char,	comm,	TASK_COMM_LEN	)
-		__field(	pid_t,	pid			)
-	),
-
-	TP_fast_assign(
-		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
-		__entry->pid	= p->pid;
-		__entry->sig	= sig;
-	),
-
-	TP_printk("sig: %d  task %s:%d",
-		  __entry->sig, __entry->comm, __entry->pid)
-);
-
-#undef TRACE_SYSTEM

include/trace/skb.h

-#ifndef _TRACE_SKB_H_
-#define _TRACE_SKB_H_
+#if !defined(_TRACE_SKB_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_SKB_H
 
 #include <linux/skbuff.h>
 #include <linux/tracepoint.h>
 
-#include <trace/skb_event_types.h>
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM skb
 
-#endif
+/*
+ * Tracepoint for free an sk_buff:
+ */
+TRACE_EVENT(kfree_skb,
+
+	TP_PROTO(struct sk_buff *skb, void *location),
+
+	TP_ARGS(skb, location),
+
+	TP_STRUCT__entry(
+		__field(	void *,		skbaddr		)
+		__field(	unsigned short,	protocol	)
+		__field(	void *,		location	)
+	),
+
+	TP_fast_assign(
+		__entry->skbaddr = skb;
+		if (skb) {
+			__entry->protocol = ntohs(skb->protocol);
+		}
+		__entry->location = location;
+	),
+
+	TP_printk("skbaddr=%p protocol=%u location=%p",
+		__entry->skbaddr, __entry->protocol, __entry->location)
+);
+
+#endif /* _TRACE_SKB_H */

include/trace/skb_event_types.h

-
-/* use <trace/skb.h> instead */
-#ifndef TRACE_EVENT
-# error Do not include this file directly.
-# error Unless you know what you are doing.
-#endif
-
-#undef TRACE_SYSTEM
-#define TRACE_SYSTEM skb
-
-/*
- * Tracepoint for free an sk_buff:
- */
-TRACE_EVENT(kfree_skb,
-
-	TP_PROTO(struct sk_buff *skb, void *location),
-
-	TP_ARGS(skb, location),
-
-	TP_STRUCT__entry(
-		__field(	void *,		skbaddr		)
-		__field(	unsigned short,	protocol	)
-		__field(	void *,		location	)
-	),
-
-	TP_fast_assign(
-		__entry->skbaddr = skb;
-		if (skb) {
-			__entry->protocol = ntohs(skb->protocol);
-		}
-		__entry->location = location;
-	),
-
-	TP_printk("skbaddr=%p protocol=%u location=%p",
-		__entry->skbaddr, __entry->protocol, __entry->location)
-);
-
-#undef TRACE_SYSTEM

include/trace/trace_event_types.h

-/* trace/<type>_event_types.h here */
-
-#include <trace/sched_event_types.h>
-#include <trace/irq_event_types.h>
-#include <trace/lockdep_event_types.h>
-#include <trace/skb_event_types.h>
-#include <trace/kmem_event_types.h>

kernel/trace/events.c

@@ -8,6 +8,7 @@
 
 #include "trace_output.h"
 
+#define TRACE_HEADER_MULTI_READ
 #include "trace_events_stage_1.h"
 #include "trace_events_stage_2.h"
 #include "trace_events_stage_3.h"

kernel/trace/trace_events_stage_1.h

 /*
  * Stage 1 of the trace events.
  *
- * Override the macros in <trace/trace_event_types.h> to include the following:
+ * Override the macros in <trace/trace_events.h> to include the following:
  *
  * struct ftrace_raw_<call> {
  *	struct trace_entry		ent;
@@ -36,4 +36,4 @@
 	};							\
 	static struct ftrace_event_call event_##name
 
-#include <trace/trace_event_types.h>
+#include <trace/trace_events.h>

kernel/trace/trace_events_stage_2.h

 /*
  * Stage 2 of the trace events.
  *
- * Override the macros in <trace/trace_event_types.h> to include the following:
+ * Override the macros in <trace/trace_events.h> to include the following:
  *
  * enum print_line_t
  * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
@@ -64,7 +64,7 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags)	\
 	return TRACE_TYPE_HANDLED;					\
 }
 	
-#include <trace/trace_event_types.h>
+#include <trace/trace_events.h>
 
 /*
  * Setup the showing format of trace point.
@@ -128,7 +128,7 @@ ftrace_format_##call(struct trace_seq *s)				\
 	return ret;							\
 }
 
-#include <trace/trace_event_types.h>
+#include <trace/trace_events.h>
 
 #undef __field
 #define __field(type, item)						\
@@ -167,4 +167,4 @@ ftrace_define_fields_##call(void)					\
 	return ret;							\
 }
 
-#include <trace/trace_event_types.h>
+#include <trace/trace_events.h>

kernel/trace/trace_events_stage_3.h

 /*
  * Stage 3 of the trace events.
  *
- * Override the macros in <trace/trace_event_types.h> to include the following:
+ * Override the macros in <trace/trace_events.h> to include the following:
  *
  * static void ftrace_event_<call>(proto)
  * {
@@ -272,7 +272,7 @@ __attribute__((section("_ftrace_events"))) event_##call = {		\
 	_TRACE_PROFILE_INIT(call)					\
 }
 
-#include <trace/trace_event_types.h>
+#include <trace/trace_events.h>
 
 #undef _TRACE_PROFILE
 #undef _TRACE_PROFILE_INIT