Merge branch 'tip/tracing/ftrace' of...

Merge branch 'tip/tracing/ftrace' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace

Documentation/tracepoints.txt

@@ -45,8 +45,8 @@ In include/trace/subsys.h :
 #include <linux/tracepoint.h>
 
 DECLARE_TRACE(subsys_eventname,
-	TPPROTO(int firstarg, struct task_struct *p),
-	TPARGS(firstarg, p));
+	TP_PROTO(int firstarg, struct task_struct *p),
+	TP_ARGS(firstarg, p));
 
 In subsys/file.c (where the tracing statement must be added) :
 
@@ -66,10 +66,10 @@ Where :
     - subsys is the name of your subsystem.
     - eventname is the name of the event to trace.
 
-- TPPROTO(int firstarg, struct task_struct *p) is the prototype of the
+- TP_PROTO(int firstarg, struct task_struct *p) is the prototype of the
   function called by this tracepoint.
 
-- TPARGS(firstarg, p) are the parameters names, same as found in the
+- TP_ARGS(firstarg, p) are the parameters names, same as found in the
   prototype.
 
 Connecting a function (probe) to a tracepoint is done by providing a

include/linux/tracepoint.h

@@ -31,8 +31,8 @@ struct tracepoint {
 					 * Keep in sync with vmlinux.lds.h.
 					 */
 
-#define TPPROTO(args...)	args
-#define TPARGS(args...)		args
+#define TP_PROTO(args...)	args
+#define TP_ARGS(args...)		args
 
 #ifdef CONFIG_TRACEPOINTS
 
@@ -65,7 +65,7 @@ struct tracepoint {
 	{								\
 		if (unlikely(__tracepoint_##name.state))		\
 			__DO_TRACE(&__tracepoint_##name,		\
-				TPPROTO(proto), TPARGS(args));		\
+				TP_PROTO(proto), TP_ARGS(args));	\
 	}								\
 	static inline int register_trace_##name(void (*probe)(proto))	\
 	{								\
@@ -157,7 +157,7 @@ static inline void tracepoint_synchronize_unregister(void)
 #define TRACE_FORMAT(name, proto, args, fmt)		\
 	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
 
-#define TRACE_EVENT_FORMAT(name, proto, args, fmt, struct, tpfmt)	\
-	TRACE_FORMAT(name, PARAMS(proto), PARAMS(args), PARAMS(fmt))
+#define TRACE_EVENT(name, proto, args, struct, print, assign)	\
+	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
 
 #endif

include/trace/block.h

@@ -5,72 +5,72 @@
 #include <linux/tracepoint.h>
 
 DECLARE_TRACE(block_rq_abort,
-	TPPROTO(struct request_queue *q, struct request *rq),
-		TPARGS(q, rq));
+	TP_PROTO(struct request_queue *q, struct request *rq),
+	      TP_ARGS(q, rq));
 
 DECLARE_TRACE(block_rq_insert,
-	TPPROTO(struct request_queue *q, struct request *rq),
-		TPARGS(q, rq));
+	TP_PROTO(struct request_queue *q, struct request *rq),
+	      TP_ARGS(q, rq));
 
 DECLARE_TRACE(block_rq_issue,
-	TPPROTO(struct request_queue *q, struct request *rq),
-		TPARGS(q, rq));
+	TP_PROTO(struct request_queue *q, struct request *rq),
+	      TP_ARGS(q, rq));
 
 DECLARE_TRACE(block_rq_requeue,
-	TPPROTO(struct request_queue *q, struct request *rq),
-		TPARGS(q, rq));
+	TP_PROTO(struct request_queue *q, struct request *rq),
+	      TP_ARGS(q, rq));
 
 DECLARE_TRACE(block_rq_complete,
-	TPPROTO(struct request_queue *q, struct request *rq),
-		TPARGS(q, rq));
+	TP_PROTO(struct request_queue *q, struct request *rq),
+	      TP_ARGS(q, rq));
 
 DECLARE_TRACE(block_bio_bounce,
-	TPPROTO(struct request_queue *q, struct bio *bio),
-		TPARGS(q, bio));
+	TP_PROTO(struct request_queue *q, struct bio *bio),
+	      TP_ARGS(q, bio));
 
 DECLARE_TRACE(block_bio_complete,
-	TPPROTO(struct request_queue *q, struct bio *bio),
-		TPARGS(q, bio));
+	TP_PROTO(struct request_queue *q, struct bio *bio),
+	      TP_ARGS(q, bio));
 
 DECLARE_TRACE(block_bio_backmerge,
-	TPPROTO(struct request_queue *q, struct bio *bio),
-		TPARGS(q, bio));
+	TP_PROTO(struct request_queue *q, struct bio *bio),
+	      TP_ARGS(q, bio));
 
 DECLARE_TRACE(block_bio_frontmerge,
-	TPPROTO(struct request_queue *q, struct bio *bio),
-		TPARGS(q, bio));
+	TP_PROTO(struct request_queue *q, struct bio *bio),
+	      TP_ARGS(q, bio));
 
 DECLARE_TRACE(block_bio_queue,
-	TPPROTO(struct request_queue *q, struct bio *bio),
-		TPARGS(q, bio));
+	TP_PROTO(struct request_queue *q, struct bio *bio),
+	      TP_ARGS(q, bio));
 
 DECLARE_TRACE(block_getrq,
-	TPPROTO(struct request_queue *q, struct bio *bio, int rw),
-		TPARGS(q, bio, rw));
+	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
+	      TP_ARGS(q, bio, rw));
 
 DECLARE_TRACE(block_sleeprq,
-	TPPROTO(struct request_queue *q, struct bio *bio, int rw),
-		TPARGS(q, bio, rw));
+	TP_PROTO(struct request_queue *q, struct bio *bio, int rw),
+	      TP_ARGS(q, bio, rw));
 
 DECLARE_TRACE(block_plug,
-	TPPROTO(struct request_queue *q),
-		TPARGS(q));
+	TP_PROTO(struct request_queue *q),
+	      TP_ARGS(q));
 
 DECLARE_TRACE(block_unplug_timer,
-	TPPROTO(struct request_queue *q),
-		TPARGS(q));
+	TP_PROTO(struct request_queue *q),
+	      TP_ARGS(q));
 
 DECLARE_TRACE(block_unplug_io,
-	TPPROTO(struct request_queue *q),
-		TPARGS(q));
+	TP_PROTO(struct request_queue *q),
+	      TP_ARGS(q));
 
 DECLARE_TRACE(block_split,
-	TPPROTO(struct request_queue *q, struct bio *bio, unsigned int pdu),
-		TPARGS(q, bio, pdu));
+	TP_PROTO(struct request_queue *q, struct bio *bio, unsigned int pdu),
+	      TP_ARGS(q, bio, pdu));
 
 DECLARE_TRACE(block_remap,
-	TPPROTO(struct request_queue *q, struct bio *bio, dev_t dev,
+	TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
 		 sector_t from, sector_t to),
-		TPARGS(q, bio, dev, from, to));
+	      TP_ARGS(q, bio, dev, from, to));
 
 #endif

include/trace/irq_event_types.h

@@ -8,26 +8,36 @@
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM irq
 
-TRACE_EVENT_FORMAT(irq_handler_entry,
-	TPPROTO(int irq, struct irqaction *action),
-	TPARGS(irq, action),
-	TPFMT("irq=%d handler=%s", irq, action->name),
-	TRACE_STRUCT(
-		TRACE_FIELD(int, irq, irq)
-	),
-	TPRAWFMT("irq %d")
+/*
+ * 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)
 	);
 
-TRACE_EVENT_FORMAT(irq_handler_exit,
-	TPPROTO(int irq, struct irqaction *action, int ret),
-	TPARGS(irq, action, ret),
-	TPFMT("irq=%d handler=%s return=%s",
-		irq, action->name, ret ? "handled" : "unhandled"),
-	TRACE_STRUCT(
-		TRACE_FIELD(int, irq, irq)
-		TRACE_FIELD(int, ret, ret)
+/*
+ * 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	)
 	),
-	TPRAWFMT("irq %d ret %d")
-	);
+
+	TP_printk("irq=%d return=%s",
+		  __entry->irq, __entry->ret ? "handled" : "unhandled"),
+
+	TP_fast_assign(
+		__entry->irq	= irq;
+		__entry->ret	= ret;
+	)
+);
 
 #undef TRACE_SYSTEM

include/trace/lockdep_event_types.h

 
-#ifndef TRACE_EVENT_FORMAT
+#ifndef TRACE_FORMAT
 # error Do not include this file directly.
 # error Unless you know what you are doing.
 #endif
@@ -10,32 +10,32 @@
 #ifdef CONFIG_LOCKDEP
 
 TRACE_FORMAT(lock_acquire,
-	TPPROTO(struct lockdep_map *lock, unsigned int subclass,
+	TP_PROTO(struct lockdep_map *lock, unsigned int subclass,
 		int trylock, int read, int check,
 		struct lockdep_map *next_lock, unsigned long ip),
-	TPARGS(lock, subclass, trylock, read, check, next_lock, ip),
-	TPFMT("%s%s%s", trylock ? "try " : "",
+	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,
-	TPPROTO(struct lockdep_map *lock, int nested, unsigned long ip),
-	TPARGS(lock, nested, ip),
-	TPFMT("%s", lock->name)
+	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,
-	TPPROTO(struct lockdep_map *lock, unsigned long ip),
-	TPARGS(lock, ip),
-	TPFMT("%s", lock->name)
+	TP_PROTO(struct lockdep_map *lock, unsigned long ip),
+	TP_ARGS(lock, ip),
+	TP_FMT("%s", lock->name)
 	);
 
 TRACE_FORMAT(lock_acquired,
-	TPPROTO(struct lockdep_map *lock, unsigned long ip),
-	TPARGS(lock, ip),
-	TPFMT("%s", lock->name)
+	TP_PROTO(struct lockdep_map *lock, unsigned long ip),
+	TP_ARGS(lock, ip),
+	TP_FMT("%s", lock->name)
 	);
 
 #endif

include/trace/power.h

@@ -18,15 +18,15 @@ struct power_trace {
 };
 
 DECLARE_TRACE(power_start,
-	TPPROTO(struct power_trace *it, unsigned int type, unsigned int state),
-		TPARGS(it, type, state));
+	TP_PROTO(struct power_trace *it, unsigned int type, unsigned int state),
+	      TP_ARGS(it, type, state));
 
 DECLARE_TRACE(power_mark,
-	TPPROTO(struct power_trace *it, unsigned int type, unsigned int state),
-		TPARGS(it, type, state));
+	TP_PROTO(struct power_trace *it, unsigned int type, unsigned int state),
+	      TP_ARGS(it, type, state));
 
 DECLARE_TRACE(power_end,
-	TPPROTO(struct power_trace *it),
-		TPARGS(it));
+	TP_PROTO(struct power_trace *it),
+	      TP_ARGS(it));
 
 #endif /* _TRACE_POWER_H */

include/trace/workqueue.h

@@ -6,20 +6,20 @@
 #include <linux/sched.h>
 
 DECLARE_TRACE(workqueue_insertion,
-	   TPPROTO(struct task_struct *wq_thread, struct work_struct *work),
-	   TPARGS(wq_thread, work));
+	   TP_PROTO(struct task_struct *wq_thread, struct work_struct *work),
+	   TP_ARGS(wq_thread, work));
 
 DECLARE_TRACE(workqueue_execution,
-	   TPPROTO(struct task_struct *wq_thread, struct work_struct *work),
-	   TPARGS(wq_thread, work));
+	   TP_PROTO(struct task_struct *wq_thread, struct work_struct *work),
+	   TP_ARGS(wq_thread, work));
 
 /* Trace the creation of one workqueue thread on a cpu */
 DECLARE_TRACE(workqueue_creation,
-	   TPPROTO(struct task_struct *wq_thread, int cpu),
-	   TPARGS(wq_thread, cpu));
+	   TP_PROTO(struct task_struct *wq_thread, int cpu),
+	   TP_ARGS(wq_thread, cpu));
 
 DECLARE_TRACE(workqueue_destruction,
-	   TPPROTO(struct task_struct *wq_thread),
-	   TPARGS(wq_thread));
+	   TP_PROTO(struct task_struct *wq_thread),
+	   TP_ARGS(wq_thread));
 
 #endif /* __TRACE_WORKQUEUE_H */

kernel/trace/events.c

@@ -2,9 +2,7 @@
  * This is the place to register all trace points as events.
  */
 
-/* someday this needs to go in a generic header */
-#define __STR(x) #x
-#define STR(x) __STR(x)
+#include <linux/stringify.h>
 
 #include <trace/trace_events.h>
 

kernel/trace/trace.h

@@ -751,12 +751,7 @@ struct ftrace_event_call {
 	int		(*regfunc)(void);
 	void		(*unregfunc)(void);
 	int		id;
-	struct dentry	*raw_dir;
-	int		raw_enabled;
-	int		type;
 	int		(*raw_init)(void);
-	int		(*raw_reg)(void);
-	void		(*raw_unreg)(void);
 	int		(*show_format)(struct trace_seq *s);
 };
 

kernel/trace/trace_event_types.h

@@ -10,7 +10,7 @@ TRACE_EVENT_FORMAT(function, TRACE_FN, ftrace_entry, ignore,
 		TRACE_FIELD(unsigned long, ip, ip)
 		TRACE_FIELD(unsigned long, parent_ip, parent_ip)
 	),
-	TPRAWFMT(" %lx <-- %lx")
+	TP_RAW_FMT(" %lx <-- %lx")
 );
 
 TRACE_EVENT_FORMAT(funcgraph_entry, TRACE_GRAPH_ENT,
@@ -19,7 +19,7 @@ TRACE_EVENT_FORMAT(funcgraph_entry, TRACE_GRAPH_ENT,
 		TRACE_FIELD(unsigned long, graph_ent.func, func)
 		TRACE_FIELD(int, graph_ent.depth, depth)
 	),
-	TPRAWFMT("--> %lx (%d)")
+	TP_RAW_FMT("--> %lx (%d)")
 );
 
 TRACE_EVENT_FORMAT(funcgraph_exit, TRACE_GRAPH_RET,
@@ -28,7 +28,7 @@ TRACE_EVENT_FORMAT(funcgraph_exit, TRACE_GRAPH_RET,
 		TRACE_FIELD(unsigned long, ret.func, func)
 		TRACE_FIELD(int, ret.depth, depth)
 	),
-	TPRAWFMT("<-- %lx (%d)")
+	TP_RAW_FMT("<-- %lx (%d)")
 );
 
 TRACE_EVENT_FORMAT(wakeup, TRACE_WAKE, ctx_switch_entry, ignore,
@@ -41,7 +41,7 @@ TRACE_EVENT_FORMAT(wakeup, TRACE_WAKE, ctx_switch_entry, ignore,
 		TRACE_FIELD(unsigned char, next_state, next_state)
 		TRACE_FIELD(unsigned int, next_cpu, next_cpu)
 	),
-	TPRAWFMT("%u:%u:%u  ==+ %u:%u:%u [%03u]")
+	TP_RAW_FMT("%u:%u:%u  ==+ %u:%u:%u [%03u]")
 );
 
 TRACE_EVENT_FORMAT(context_switch, TRACE_CTX, ctx_switch_entry, ignore,
@@ -54,7 +54,7 @@ TRACE_EVENT_FORMAT(context_switch, TRACE_CTX, ctx_switch_entry, ignore,
 		TRACE_FIELD(unsigned char, next_state, next_state)
 		TRACE_FIELD(unsigned int, next_cpu, next_cpu)
 	),
-	TPRAWFMT("%u:%u:%u  ==+ %u:%u:%u [%03u]")
+	TP_RAW_FMT("%u:%u:%u  ==+ %u:%u:%u [%03u]")
 );
 
 TRACE_EVENT_FORMAT(special, TRACE_SPECIAL, special_entry, ignore,
@@ -63,7 +63,7 @@ TRACE_EVENT_FORMAT(special, TRACE_SPECIAL, special_entry, ignore,
 		TRACE_FIELD(unsigned long, arg2, arg2)
 		TRACE_FIELD(unsigned long, arg3, arg3)
 	),
-	TPRAWFMT("(%08lx) (%08lx) (%08lx)")
+	TP_RAW_FMT("(%08lx) (%08lx) (%08lx)")
 );
 
 /*
@@ -83,7 +83,7 @@ TRACE_EVENT_FORMAT(kernel_stack, TRACE_STACK, stack_entry, ignore,
 		TRACE_FIELD(unsigned long, caller[6], stack6)
 		TRACE_FIELD(unsigned long, caller[7], stack7)
 	),
-	TPRAWFMT("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n"
+	TP_RAW_FMT("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n"
 		 "\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n")
 );
 
@@ -98,7 +98,7 @@ TRACE_EVENT_FORMAT(user_stack, TRACE_USER_STACK, userstack_entry, ignore,
 		TRACE_FIELD(unsigned long, caller[6], stack6)
 		TRACE_FIELD(unsigned long, caller[7], stack7)
 	),
-	TPRAWFMT("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n"
+	TP_RAW_FMT("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n"
 		 "\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n")
 );
 
@@ -106,9 +106,10 @@ TRACE_EVENT_FORMAT(print, TRACE_PRINT, print_entry, ignore,
 	TRACE_STRUCT(
 		TRACE_FIELD(unsigned long, ip, ip)
 		TRACE_FIELD(unsigned int, depth, depth)
+		TRACE_FIELD(char *, fmt, fmt)
 		TRACE_FIELD_ZERO_CHAR(buf)
 	),
-	TPRAWFMT("%08lx (%d) %s")
+	TP_RAW_FMT("%08lx (%d) fmt:%p %s")
 );
 
 TRACE_EVENT_FORMAT(branch, TRACE_BRANCH, trace_branch, ignore,
@@ -118,7 +119,7 @@ TRACE_EVENT_FORMAT(branch, TRACE_BRANCH, trace_branch, ignore,
 		TRACE_FIELD_SPECIAL(char file[TRACE_FUNC_SIZE+1], file, file)
 		TRACE_FIELD(char, correct, correct)
 	),
-	TPRAWFMT("%u:%s:%s (%u)")
+	TP_RAW_FMT("%u:%s:%s (%u)")
 );
 
 TRACE_EVENT_FORMAT(hw_branch, TRACE_HW_BRANCHES, hw_branch_entry, ignore,
@@ -126,7 +127,7 @@ TRACE_EVENT_FORMAT(hw_branch, TRACE_HW_BRANCHES, hw_branch_entry, ignore,
 		TRACE_FIELD(u64, from, from)
 		TRACE_FIELD(u64, to, to)
 	),
-	TPRAWFMT("from: %llx to: %llx")
+	TP_RAW_FMT("from: %llx to: %llx")
 );
 
 TRACE_EVENT_FORMAT(power, TRACE_POWER, trace_power, ignore,
@@ -136,7 +137,7 @@ TRACE_EVENT_FORMAT(power, TRACE_POWER, trace_power, ignore,
 		TRACE_FIELD(int, state_data.type, type)
 		TRACE_FIELD(int, state_data.state, state)
 	),
-	TPRAWFMT("%llx->%llx type:%u state:%u")
+	TP_RAW_FMT("%llx->%llx type:%u state:%u")
 );
 
 TRACE_EVENT_FORMAT(kmem_alloc, TRACE_KMEM_ALLOC, kmemtrace_alloc_entry, ignore,
@@ -149,7 +150,7 @@ TRACE_EVENT_FORMAT(kmem_alloc, TRACE_KMEM_ALLOC, kmemtrace_alloc_entry, ignore,
 		TRACE_FIELD(gfp_t, gfp_flags, gfp_flags)
 		TRACE_FIELD(int, node, node)
 	),
-	TPRAWFMT("type:%u call_site:%lx ptr:%p req:%lu alloc:%lu"
+	TP_RAW_FMT("type:%u call_site:%lx ptr:%p req:%lu alloc:%lu"
 		 " flags:%x node:%d")
 );
 
@@ -159,7 +160,7 @@ TRACE_EVENT_FORMAT(kmem_free, TRACE_KMEM_FREE, kmemtrace_free_entry, ignore,
 		TRACE_FIELD(unsigned long, call_site, call_site)
 		TRACE_FIELD(const void *, ptr, ptr)
 	),
-	TPRAWFMT("type:%u call_site:%lx ptr:%p")
+	TP_RAW_FMT("type:%u call_site:%lx ptr:%p")
 );
 
 #undef TRACE_SYSTEM

kernel/trace/trace_events.c

@@ -59,22 +59,12 @@ static void ftrace_event_enable_disable(struct ftrace_event_call *call,
 			call->enabled = 0;
 			call->unregfunc();
 		}
-		if (call->raw_enabled) {
-			call->raw_enabled = 0;
-			call->raw_unreg();
-		}
 		break;
 	case 1:
-		if (!call->enabled &&
-		    (call->type & TRACE_EVENT_TYPE_PRINTF)) {
+		if (!call->enabled) {
 			call->enabled = 1;
 			call->regfunc();
 		}
-		if (!call->raw_enabled &&
-		    (call->type & TRACE_EVENT_TYPE_RAW)) {
-			call->raw_enabled = 1;
-			call->raw_reg();
-		}
 		break;
 	}
 }
@@ -300,7 +290,7 @@ event_enable_read(struct file *filp, char __user *ubuf, size_t cnt,
 	struct ftrace_event_call *call = filp->private_data;
 	char *buf;
 
-	if (call->enabled || call->raw_enabled)
+	if (call->enabled)
 		buf = "1\n";
 	else
 		buf = "0\n";
@@ -346,110 +336,10 @@ event_enable_write(struct file *filp, const char __user *ubuf, size_t cnt,
 	return cnt;
 }
 
-static ssize_t
-event_type_read(struct file *filp, char __user *ubuf, size_t cnt,
-		loff_t *ppos)
-{
-	struct ftrace_event_call *call = filp->private_data;
-	char buf[16];
-	int r = 0;
-
-	if (call->type & TRACE_EVENT_TYPE_PRINTF)
-		r += sprintf(buf, "printf\n");
-
-	if (call->type & TRACE_EVENT_TYPE_RAW)
-		r += sprintf(buf+r, "raw\n");
-
-	return simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
-}
-
-static ssize_t
-event_type_write(struct file *filp, const char __user *ubuf, size_t cnt,
-		 loff_t *ppos)
-{
-	struct ftrace_event_call *call = filp->private_data;
-	char buf[64];
-
-	/*
-	 * If there's only one type, we can't change it.
-	 * And currently we always have printf type, and we
-	 * may or may not have raw type.
-	 *
-	 * This is a redundant check, the file should be read
-	 * only if this is the case anyway.
-	 */
-
-	if (!call->raw_init)
-		return -EPERM;
-
-	if (cnt >= sizeof(buf))
-		return -EINVAL;
-
-	if (copy_from_user(&buf, ubuf, cnt))
-		return -EFAULT;
-
-	buf[cnt] = 0;
-
-	if (!strncmp(buf, "printf", 6) &&
-	    (!buf[6] || isspace(buf[6]))) {
-
-		call->type = TRACE_EVENT_TYPE_PRINTF;
-
-		/*
-		 * If raw enabled, the disable it and enable
-		 * printf type.
-		 */
-		if (call->raw_enabled) {
-			call->raw_enabled = 0;
-			call->raw_unreg();
-
-			call->enabled = 1;
-			call->regfunc();
-		}
-
-	} else if (!strncmp(buf, "raw", 3) &&
-	    (!buf[3] || isspace(buf[3]))) {
-
-		call->type = TRACE_EVENT_TYPE_RAW;
-
-		/*
-		 * If printf enabled, the disable it and enable
-		 * raw type.
-		 */
-		if (call->enabled) {
-			call->enabled = 0;
-			call->unregfunc();
-
-			call->raw_enabled = 1;
-			call->raw_reg();
-		}
-	} else
-		return -EINVAL;
-
-	*ppos += cnt;
-
-	return cnt;
-}
-
-static ssize_t
-event_available_types_read(struct file *filp, char __user *ubuf, size_t cnt,
-			   loff_t *ppos)
-{
-	struct ftrace_event_call *call = filp->private_data;
-	char buf[16];
-	int r = 0;
-
-	r += sprintf(buf, "printf\n");
-
-	if (call->raw_init)
-		r += sprintf(buf+r, "raw\n");
-
-	return simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
-}
-
 #undef FIELD
 #define FIELD(type, name)						\
-	#type, #name, offsetof(typeof(field), name), sizeof(field.name)
+	#type, #name, (unsigned int)offsetof(typeof(field), name),	\
+		(unsigned int)sizeof(field.name)
 
 static int trace_write_header(struct trace_seq *s)
 {
@@ -457,11 +347,11 @@ static int trace_write_header(struct trace_seq *s)
 
 	/* struct trace_entry */
 	return trace_seq_printf(s,
-				"\tfield:%s %s;\toffset:%lu;\tsize:%lu;\n"
-				"\tfield:%s %s;\toffset:%lu;\tsize:%lu;\n"
-				"\tfield:%s %s;\toffset:%lu;\tsize:%lu;\n"
-				"\tfield:%s %s;\toffset:%lu;\tsize:%lu;\n"
-				"\tfield:%s %s;\toffset:%lu;\tsize:%lu;\n"
+				"\tfield:%s %s;\toffset:%u;\tsize:%u;\n"
+				"\tfield:%s %s;\toffset:%u;\tsize:%u;\n"
+				"\tfield:%s %s;\toffset:%u;\tsize:%u;\n"
+				"\tfield:%s %s;\toffset:%u;\tsize:%u;\n"
+				"\tfield:%s %s;\toffset:%u;\tsize:%u;\n"
 				"\n",
 				FIELD(unsigned char, type),
 				FIELD(unsigned char, flags),
@@ -469,6 +359,7 @@ static int trace_write_header(struct trace_seq *s)
 				FIELD(int, pid),
 				FIELD(int, tgid));
 }
+
 static ssize_t
 event_format_read(struct file *filp, char __user *ubuf, size_t cnt,
 		  loff_t *ppos)
@@ -526,13 +417,6 @@ static const struct seq_operations show_set_event_seq_ops = {
 	.stop = t_stop,
 };
 
-static const struct file_operations ftrace_avail_fops = {
-	.open = ftrace_event_seq_open,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = seq_release,
-};
-
 static const struct file_operations ftrace_set_event_fops = {
 	.open = ftrace_event_seq_open,
 	.read = seq_read,
@@ -547,17 +431,6 @@ static const struct file_operations ftrace_enable_fops = {
 	.write = event_enable_write,
 };
 
-static const struct file_operations ftrace_type_fops = {
-	.open = tracing_open_generic,
-	.read = event_type_read,
-	.write = event_type_write,
-};
-
-static const struct file_operations ftrace_available_types_fops = {
-	.open = tracing_open_generic,
-	.read = event_available_types_read,
-};
-
 static const struct file_operations ftrace_event_format_fops = {
 	.open = tracing_open_generic,
 	.read = event_format_read,
@@ -646,9 +519,6 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events)
 		}
 	}
 
-	/* default the output to printf */
-	call->type = TRACE_EVENT_TYPE_PRINTF;
-
 	call->dir = debugfs_create_dir(call->name, d_events);
 	if (!call->dir) {
 		pr_warning("Could not create debugfs "
@@ -664,21 +534,6 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events)
 				   "'%s/enable' entry\n", call->name);
 	}
 
-	/* Only let type be writable, if we can change it */
-	entry = debugfs_create_file("type",
-				    call->raw_init ? 0644 : 0444,
-				    call->dir, call,
-				    &ftrace_type_fops);
-	if (!entry)
-		pr_warning("Could not create debugfs "
-			   "'%s/type' entry\n", call->name);
-
-	entry = debugfs_create_file("available_types", 0444, call->dir, call,
-				    &ftrace_available_types_fops);
-	if (!entry)
-		pr_warning("Could not create debugfs "
-			   "'%s/available_types' entry\n", call->name);
-
 	/* A trace may not want to export its format */
 	if (!call->show_format)
 		return 0;
@@ -703,13 +558,6 @@ static __init int event_trace_init(void)
 	if (!d_tracer)
 		return 0;
 
-	entry = debugfs_create_file("available_events", 0444, d_tracer,
-				    (void *)&show_event_seq_ops,
-				    &ftrace_avail_fops);
-	if (!entry)
-		pr_warning("Could not create debugfs "
-			   "'available_events' entry\n");
-
 	entry = debugfs_create_file("set_event", 0644, d_tracer,
 				    (void *)&show_set_event_seq_ops,
 				    &ftrace_set_event_fops);

kernel/trace/trace_events_stage_1.h

@@ -17,20 +17,21 @@
 #undef TRACE_FORMAT
 #define TRACE_FORMAT(call, proto, args, fmt)
 
-#undef TRACE_EVENT_FORMAT
-#define TRACE_EVENT_FORMAT(name, proto, args, fmt, tstruct, tpfmt)	\
+#undef __array
+#define __array(type, item, len)	type	item[len];
+
+#undef __field
+#define __field(type, item)		type	item;
+
+#undef TP_STRUCT__entry
+#define TP_STRUCT__entry(args...) args
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(name, proto, args, tstruct, print, assign)	\
 	struct ftrace_raw_##name {				\
 		struct trace_entry	ent;			\
 		tstruct						\
 	};							\
 	static struct ftrace_event_call event_##name
 
-#undef TRACE_STRUCT
-#define TRACE_STRUCT(args...) args
-
-#define TRACE_FIELD(type, item, assign) \
-	type item;
-#define TRACE_FIELD_SPECIAL(type_item, item, cmd) \
-	type_item;
-
 #include <trace/trace_event_types.h>

kernel/trace/trace_events_stage_2.h

@@ -20,7 +20,7 @@
  *
  *	field = (typeof(field))entry;
  *
- *	ret = trace_seq_printf(s, <TPRAWFMT> "%s", <ARGS> "\n");
+ *	ret = trace_seq_printf(s, <TP_RAW_FMT> "%s", <ARGS> "\n");
  *	if (!ret)
  *		return TRACE_TYPE_PARTIAL_LINE;
  *
@@ -32,23 +32,14 @@
  * in binary.
  */
 
-#undef TRACE_STRUCT
-#define TRACE_STRUCT(args...) args
+#undef __entry
+#define __entry field
 
-#undef TRACE_FIELD
-#define TRACE_FIELD(type, item, assign) \
-	field->item,
+#undef TP_printk
+#define TP_printk(fmt, args...) fmt "\n", args
 
-#undef TRACE_FIELD_SPECIAL
-#define TRACE_FIELD_SPECIAL(type_item, item, cmd) \
-	field->item,
-
-
-#undef TPRAWFMT
-#define TPRAWFMT(args...)	args
-
-#undef TRACE_EVENT_FORMAT
-#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)	\
+#undef TRACE_EVENT
+#define TRACE_EVENT(call, proto, args, tstruct, print, assign)		\
 enum print_line_t							\
 ftrace_raw_output_##call(struct trace_iterator *iter, int flags)	\
 {									\
@@ -66,7 +57,7 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags)	\
 									\
 	field = (typeof(field))entry;					\
 									\
-	ret = trace_seq_printf(s, tpfmt "%s", tstruct "\n");		\
+	ret = trace_seq_printf(s, print);				\
 	if (!ret)							\
 		return TRACE_TYPE_PARTIAL_LINE;				\
 									\
@@ -75,5 +66,67 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags)	\
 	
 #include <trace/trace_event_types.h>
 
-#include "trace_format.h"
+/*
+ * Setup the showing format of trace point.
+ *
+ * int
+ * ftrace_format_##call(struct trace_seq *s)
+ * {
+ *	struct ftrace_raw_##call field;
+ *	int ret;
+ *
+ *	ret = trace_seq_printf(s, #type " " #item ";"
+ *			       " size:%d; offset:%d;\n",
+ *			       sizeof(field.type),
+ *			       offsetof(struct ftrace_raw_##call,
+ *					item));
+ *
+ * }
+ */
+
+#undef TP_STRUCT__entry
+#define TP_STRUCT__entry(args...) args
+
+#undef __field
+#define __field(type, item)					\
+	ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"	\
+			       "offset:%u;\tsize:%u;\n",		\
+			       (unsigned int)offsetof(typeof(field), item), \
+			       (unsigned int)sizeof(field.item));	\
+	if (!ret)							\
+		return 0;
+
+#undef __array
+#define __array(type, item, len)						\
+	ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t"	\
+			       "offset:%u;\tsize:%u;\n",		\
+			       (unsigned int)offsetof(typeof(field), item), \
+			       (unsigned int)sizeof(field.item));	\
+	if (!ret)							\
+		return 0;
+
+#undef __entry
+#define __entry "REC"
+
+#undef TP_printk
+#define TP_printk(fmt, args...) "%s, %s\n", #fmt, #args
+
+#undef TP_fast_assign
+#define TP_fast_assign(args...) args
+
+#undef TRACE_EVENT
+#define TRACE_EVENT(call, proto, args, tstruct, print, func)		\
+static int								\
+ftrace_format_##call(struct trace_seq *s)				\
+{									\
+	struct ftrace_raw_##call field;					\
+	int ret;							\
+									\
+	tstruct;							\
+									\
+	trace_seq_printf(s, "\nprint fmt: " print);			\
+									\
+	return ret;							\
+}
+
 #include <trace/trace_event_types.h>

kernel/trace/trace_events_stage_3.h

@@ -35,7 +35,7 @@
  * }
  *
  *
- * For those macros defined with TRACE_EVENT_FORMAT:
+ * For those macros defined with TRACE_EVENT:
  *
  * static struct ftrace_event_call event_<call>;
  *
@@ -106,8 +106,8 @@
  *
  */
 
-#undef TPFMT
-#define TPFMT(fmt, args...)	fmt "\n", ##args
+#undef TP_FMT
+#define TP_FMT(fmt, args...)	fmt "\n", ##args
 
 #define _TRACE_FORMAT(call, proto, args, fmt)				\
 static void ftrace_event_##call(proto)					\
@@ -139,32 +139,16 @@ static struct ftrace_event_call __used					\
 __attribute__((__aligned__(4)))						\
 __attribute__((section("_ftrace_events"))) event_##call = {		\
 	.name 			= #call,				\
-	.system			= STR(TRACE_SYSTEM),			\
+	.system			= __stringify(TRACE_SYSTEM),		\
 	.regfunc		= ftrace_reg_event_##call,		\
 	.unregfunc		= ftrace_unreg_event_##call,		\
 }
 
-#undef TRACE_FIELD
-#define TRACE_FIELD(type, item, assign)\
-	entry->item = assign;
+#undef __entry
+#define __entry entry
 
-#undef TRACE_FIELD
-#define TRACE_FIELD(type, item, assign)\
-	entry->item = assign;
-
-#undef TPCMD
-#define TPCMD(cmd...)	cmd
-
-#undef TRACE_ENTRY
-#define TRACE_ENTRY	entry
-
-#undef TRACE_FIELD_SPECIAL
-#define TRACE_FIELD_SPECIAL(type_item, item, cmd) \
-	cmd;
-
-#undef TRACE_EVENT_FORMAT
-#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)	\
-_TRACE_FORMAT(call, PARAMS(proto), PARAMS(args), PARAMS(fmt))		\
+#undef TRACE_EVENT
+#define TRACE_EVENT(call, proto, args, tstruct, print, assign)		\
 									\
 static struct ftrace_event_call event_##call;				\
 									\
@@ -185,7 +169,7 @@ static void ftrace_raw_event_##call(proto)				\
 		return;							\
 	entry	= ring_buffer_event_data(event);			\
 									\
-	tstruct;							\
+	assign;								\
 									\
 	trace_current_buffer_unlock_commit(event, irq_flags, pc);	\
 }									\
@@ -225,11 +209,9 @@ static struct ftrace_event_call __used					\
 __attribute__((__aligned__(4)))						\
 __attribute__((section("_ftrace_events"))) event_##call = {		\
 	.name 			= #call,				\
-	.system			= STR(TRACE_SYSTEM),			\
-	.regfunc		= ftrace_reg_event_##call,		\
-	.unregfunc		= ftrace_unreg_event_##call,		\
+	.system			= __stringify(TRACE_SYSTEM),		\
 	.raw_init		= ftrace_raw_init_event_##call,		\
-	.raw_reg		= ftrace_raw_reg_event_##call,		\
-	.raw_unreg		= ftrace_raw_unreg_event_##call,	\
+	.regfunc		= ftrace_raw_reg_event_##call,		\
+	.unregfunc		= ftrace_raw_unreg_event_##call,	\
 	.show_format		= ftrace_format_##call,			\
 }

kernel/trace/trace_export.c

@@ -15,19 +15,40 @@
 
 #include "trace_output.h"
 
-#include "trace_format.h"
+
+#undef TRACE_STRUCT
+#define TRACE_STRUCT(args...) args
+
+#undef TRACE_FIELD
+#define TRACE_FIELD(type, item, assign)					\
+	ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"	\
+			       "offset:%u;\tsize:%u;\n",		\
+			       (unsigned int)offsetof(typeof(field), item), \
+			       (unsigned int)sizeof(field.item));	\
+	if (!ret)							\
+		return 0;
+
+
+#undef TRACE_FIELD_SPECIAL
+#define TRACE_FIELD_SPECIAL(type_item, item, cmd)			\
+	ret = trace_seq_printf(s, "\tfield special:" #type_item ";\t"	\
+			       "offset:%u;\tsize:%u;\n",		\
+			       (unsigned int)offsetof(typeof(field), item), \
+			       (unsigned int)sizeof(field.item));	\
+	if (!ret)							\
+		return 0;
 
 #undef TRACE_FIELD_ZERO_CHAR
 #define TRACE_FIELD_ZERO_CHAR(item)					\
 	ret = trace_seq_printf(s, "\tfield: char " #item ";\t"		\
-			       "offset:%lu;\tsize:0;\n",	\
-			       offsetof(typeof(field), item));	\
+			       "offset:%u;\tsize:0;\n",			\
+			       (unsigned int)offsetof(typeof(field), item)); \
 	if (!ret)							\
 		return 0;
 
 
-#undef TPRAWFMT
-#define TPRAWFMT(args...) args
+#undef TP_RAW_FMT
+#define TP_RAW_FMT(args...) args
 
 #undef TRACE_EVENT_FORMAT
 #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)	\
@@ -57,8 +78,8 @@ ftrace_format_##call(struct trace_seq *s)				\
 #define TRACE_FIELD(type, item, assign)\
 	entry->item = assign;
 
-#undef TPCMD
-#define TPCMD(cmd...)	cmd
+#undef TP_CMD
+#define TP_CMD(cmd...)	cmd
 
 #undef TRACE_ENTRY
 #define TRACE_ENTRY	entry

kernel/trace/trace_format.h

-/*
- * Setup the showing format of trace point.
- *
- * int
- * ftrace_format_##call(struct trace_seq *s)
- * {
- *	struct ftrace_raw_##call field;
- *	int ret;
- *
- *	ret = trace_seq_printf(s, #type " " #item ";"
- *			       " size:%d; offset:%d;\n",
- *			       sizeof(field.type),
- *			       offsetof(struct ftrace_raw_##call,
- *					item));
- *
- * }
- */
-
-#undef TRACE_STRUCT
-#define TRACE_STRUCT(args...) args
-
-#undef TRACE_FIELD
-#define TRACE_FIELD(type, item, assign)					\
-	ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"	\
-			       "offset:%lu;\tsize:%lu;\n",		\
-			       offsetof(typeof(field), item),		\
-			       sizeof(field.item));			\
-	if (!ret)							\
-		return 0;
-
-
-#undef TRACE_FIELD_SPECIAL
-#define TRACE_FIELD_SPECIAL(type_item, item, cmd)			\
-	ret = trace_seq_printf(s, "\tfield special:" #type_item ";\t"	\
-			       "offset:%lu;\tsize:%lu;\n",		\
-			       offsetof(typeof(field), item),		\
-			       sizeof(field.item));			\
-	if (!ret)							\
-		return 0;
-
-#undef TRACE_EVENT_FORMAT
-#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)	\
-static int								\
-ftrace_format_##call(struct trace_seq *s)				\
-{									\
-	struct ftrace_raw_##call field;					\
-	int ret;							\
-									\
-	tstruct;							\
-									\
-	trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt);		\
-									\
-	return ret;							\
-}
-

kernel/trace/trace_selftest.c

 /* Include in trace.c */
 
+#include <linux/stringify.h>
 #include <linux/kthread.h>
 #include <linux/delay.h>
 
@@ -100,9 +101,6 @@ static inline void warn_failed_init_tracer(struct tracer *trace, int init_ret)
 
 #ifdef CONFIG_DYNAMIC_FTRACE
 
-#define __STR(x) #x
-#define STR(x) __STR(x)
-
 /* Test dynamic code modification and ftrace filters */
 int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
 					   struct trace_array *tr,
@@ -130,7 +128,7 @@ int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
 	 * start of the function names. We simply put a '*' to
 	 * accommodate them.
 	 */
-	func_name = "*" STR(DYN_FTRACE_TEST_NAME);
+	func_name = "*" __stringify(DYN_FTRACE_TEST_NAME);
 
 	/* filter only on our function */
 	ftrace_set_filter(func_name, strlen(func_name), 1);

samples/tracepoints/tp-samples-trace.h

@@ -5,9 +5,9 @@
 #include <linux/tracepoint.h>
 
 DECLARE_TRACE(subsys_event,
-	TPPROTO(struct inode *inode, struct file *file),
-	TPARGS(inode, file));
+	TP_PROTO(struct inode *inode, struct file *file),
+	TP_ARGS(inode, file));
 DECLARE_TRACE(subsys_eventb,
-	TPPROTO(void),
-	TPARGS());
+	TP_PROTO(void),
+	TP_ARGS());
 #endif