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Commit da184a80 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'tracing-fixes-for-linus' of... 

Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  tracing: Fix return of trace_dump_stack()
  ksym_tracer: Fix bad cast
  tracing/power: Remove two exports
  tracing: Change event->profile_count to be int type
  tracing: Simplify trace_option_write()
  tracing: Remove useless trace option
  tracing: Use seq file for trace_clock
  tracing: Use seq file for trace_options
  function-graph: Allow writing the same val to set_graph_function
  ftrace: Call trace_parser_clear() properly
  ftrace: Return EINVAL when writing invalid val to set_ftrace_filter
  tracing: Move a printk out of ftrace_raw_reg_event_foo()
  tracing: Pull up calls to trace_define_common_fields()
  tracing: Extract duplicate ftrace_raw_init_event_foo()
  ftrace.h: Use common pr_info fmt string
  tracing: Add stack trace to irqsoff tracer
  tracing: Add trace_dump_stack()
  ring-buffer: Move resize integrity check under reader lock
  ring-buffer: Use sync sched protection on ring buffer resizing
  tracing: Fix wrong usage of strstrip in trace_ksyms
parents 525995d7 e36c5458

include/linux/ftrace_event.h

+2 −2
Original line number Diff line number Diff line
@@ -131,7 +131,7 @@ struct ftrace_event_call { 
	void			*mod;

	void			*data;



	atomic_t		profile_count;

	int			profile_count;

	int			(*profile_enable)(struct ftrace_event_call *);

	void			(*profile_disable)(struct ftrace_event_call *);

};
@@ -158,7 +158,7 @@ enum { 
	FILTER_PTR_STRING,

};



extern int trace_define_common_fields(struct ftrace_event_call *call);

extern int trace_event_raw_init(struct ftrace_event_call *call);

extern int trace_define_field(struct ftrace_event_call *call, const char *type,

			      const char *name, int offset, int size,

			      int is_signed, int filter_type);

include/linux/kernel.h

+3 −0
Original line number Diff line number Diff line
@@ -535,6 +535,8 @@ extern int 
__trace_printk(unsigned long ip, const char *fmt, ...)

	__attribute__ ((format (printf, 2, 3)));



extern void trace_dump_stack(void);



/*

 * The double __builtin_constant_p is because gcc will give us an error

 * if we try to allocate the static variable to fmt if it is not a
@@ -568,6 +570,7 @@ trace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); 
static inline void tracing_start(void) { }

static inline void tracing_stop(void) { }

static inline void ftrace_off_permanent(void) { }

static inline void trace_dump_stack(void) { }

static inline int

trace_printk(const char *fmt, ...)

{

include/linux/syscalls.h

+2 −4
Original line number Diff line number Diff line
@@ -102,12 +102,10 @@ struct perf_event_attr; 
#ifdef CONFIG_EVENT_PROFILE



#define TRACE_SYS_ENTER_PROFILE_INIT(sname)				       \

	.profile_count = ATOMIC_INIT(-1),				       \

	.profile_enable = prof_sysenter_enable,				       \

	.profile_disable = prof_sysenter_disable,



#define TRACE_SYS_EXIT_PROFILE_INIT(sname)				       \

	.profile_count = ATOMIC_INIT(-1),				       \

	.profile_enable = prof_sysexit_enable,				       \

	.profile_disable = prof_sysexit_disable,

#else
@@ -145,7 +143,7 @@ struct perf_event_attr; 
		.name                   = "sys_enter"#sname,		\

		.system                 = "syscalls",			\

		.event                  = &enter_syscall_print_##sname,	\

		.raw_init		= init_syscall_trace,		\

		.raw_init		= trace_event_raw_init,		\

		.show_format		= syscall_enter_format,		\

		.define_fields		= syscall_enter_define_fields,	\

		.regfunc		= reg_event_syscall_enter,	\
@@ -167,7 +165,7 @@ struct perf_event_attr; 
		.name                   = "sys_exit"#sname,		\

		.system                 = "syscalls",			\

		.event                  = &exit_syscall_print_##sname,	\

		.raw_init		= init_syscall_trace,		\

		.raw_init		= trace_event_raw_init,		\

		.show_format		= syscall_exit_format,		\

		.define_fields		= syscall_exit_define_fields,	\

		.regfunc		= reg_event_syscall_exit,	\

include/trace/ftrace.h

+6 −50
Original line number Diff line number Diff line
@@ -436,10 +436,6 @@ ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ 
	struct ftrace_raw_##call field;					\

	int ret;							\

									\

	ret = trace_define_common_fields(event_call);			\

	if (ret)							\

		return ret;						\

									\

	tstruct;							\

									\

	return ret;							\
@@ -559,13 +555,7 @@ static void ftrace_profile_disable_##name(struct ftrace_event_call *unused)\ 
 *

 * static int ftrace_reg_event_<call>(struct ftrace_event_call *unused)

 * {

 *	int ret;

 *

 *	ret = register_trace_<call>(ftrace_event_<call>);

 *	if (!ret)

 *		pr_info("event trace: Could not activate trace point "

 *			"probe to  <call>");

 *	return ret;

 *	return register_trace_<call>(ftrace_event_<call>);

 * }

 *

 * static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused)
@@ -623,23 +613,12 @@ static void ftrace_profile_disable_##name(struct ftrace_event_call *unused)\ 
 *	.trace			= ftrace_raw_output_<call>, <-- stage 2

 * };

 *

 * static int ftrace_raw_init_event_<call>(struct ftrace_event_call *unused)

 * {

 *	int id;

 *

 *	id = register_ftrace_event(&ftrace_event_type_<call>);

 *	if (!id)

 *		return -ENODEV;

 *	event_<call>.id = id;

 *	return 0;

 * }

 *

 * static struct ftrace_event_call __used

 * __attribute__((__aligned__(4)))

 * __attribute__((section("_ftrace_events"))) event_<call> = {

 *	.name			= "<call>",

 *	.system			= "<system>",

 *	.raw_init		= ftrace_raw_init_event_<call>,

 *	.raw_init		= trace_event_raw_init,

 *	.regfunc		= ftrace_reg_event_<call>,

 *	.unregfunc		= ftrace_unreg_event_<call>,

 *	.show_format		= ftrace_format_<call>,
@@ -647,13 +626,9 @@ static void ftrace_profile_disable_##name(struct ftrace_event_call *unused)\ 
 *

 */



#undef TP_FMT

#define TP_FMT(fmt, args...)	fmt "\n", ##args



#ifdef CONFIG_EVENT_PROFILE



#define _TRACE_PROFILE_INIT(call)					\

	.profile_count = ATOMIC_INIT(-1),				\

	.profile_enable = ftrace_profile_enable_##call,			\

	.profile_disable = ftrace_profile_disable_##call,
@@ -728,13 +703,7 @@ static void ftrace_raw_event_##call(proto) \ 
									\

static int ftrace_raw_reg_event_##call(struct ftrace_event_call *unused)\

{									\

	int ret;							\

									\

	ret = register_trace_##call(ftrace_raw_event_##call);		\

	if (ret)							\

		pr_info("event trace: Could not activate trace point "	\

			"probe to " #call "\n");			\

	return ret;							\

	return register_trace_##call(ftrace_raw_event_##call);		\

}									\

									\

static void ftrace_raw_unreg_event_##call(struct ftrace_event_call *unused)\
@@ -744,19 +713,7 @@ static void ftrace_raw_unreg_event_##call(struct ftrace_event_call *unused)\ 
									\

static struct trace_event ftrace_event_type_##call = {			\

	.trace			= ftrace_raw_output_##call,		\

};									\

									\

static int ftrace_raw_init_event_##call(struct ftrace_event_call *unused)\

{									\

	int id;								\

									\

	id = register_ftrace_event(&ftrace_event_type_##call);		\

	if (!id)							\

		return -ENODEV;						\

	event_##call.id = id;						\

	INIT_LIST_HEAD(&event_##call.fields);				\

	return 0;							\

}

};



#undef DEFINE_EVENT_PRINT

#define DEFINE_EVENT_PRINT(template, name, proto, args, print)	\
@@ -776,7 +733,7 @@ __attribute__((section("_ftrace_events"))) event_##call = { \ 
	.name			= #call,				\

	.system			= __stringify(TRACE_SYSTEM),		\

	.event			= &ftrace_event_type_##call,		\

	.raw_init		= ftrace_raw_init_event_##call,		\

	.raw_init		= trace_event_raw_init,			\

	.regfunc		= ftrace_raw_reg_event_##call,		\

	.unregfunc		= ftrace_raw_unreg_event_##call,	\

	.show_format		= ftrace_format_##template,		\
@@ -793,7 +750,7 @@ __attribute__((section("_ftrace_events"))) event_##call = { \ 
	.name			= #call,				\

	.system			= __stringify(TRACE_SYSTEM),		\

	.event			= &ftrace_event_type_##call,		\

	.raw_init		= ftrace_raw_init_event_##call,		\

	.raw_init		= trace_event_raw_init,			\

	.regfunc		= ftrace_raw_reg_event_##call,		\

	.unregfunc		= ftrace_raw_unreg_event_##call,	\

	.show_format		= ftrace_format_##call,			\
@@ -953,7 +910,6 @@ end: \ 
	perf_swevent_put_recursion_context(rctx);			\

end_recursion:								\

	local_irq_restore(irq_flags);					\

									\

}



#undef DEFINE_EVENT

kernel/trace/ftrace.c

+19 −11
Original line number Diff line number Diff line
@@ -1724,7 +1724,7 @@ ftrace_match_record(struct dyn_ftrace *rec, char *regex, int len, int type) 
	return ftrace_match(str, regex, len, type);

}



static void ftrace_match_records(char *buff, int len, int enable)

static int ftrace_match_records(char *buff, int len, int enable)

{

	unsigned int search_len;

	struct ftrace_page *pg;
@@ -1733,6 +1733,7 @@ static void ftrace_match_records(char *buff, int len, int enable) 
	char *search;

	int type;

	int not;

	int found = 0;



	flag = enable ? FTRACE_FL_FILTER : FTRACE_FL_NOTRACE;

	type = filter_parse_regex(buff, len, &search, &not);
@@ -1750,6 +1751,7 @@ static void ftrace_match_records(char *buff, int len, int enable) 
				rec->flags &= ~flag;

			else

				rec->flags |= flag;

			found = 1;

		}

		/*

		 * Only enable filtering if we have a function that
@@ -1759,6 +1761,8 @@ static void ftrace_match_records(char *buff, int len, int enable) 
			ftrace_filtered = 1;

	} while_for_each_ftrace_rec();

	mutex_unlock(&ftrace_lock);



	return found;

}



static int
@@ -1780,7 +1784,7 @@ ftrace_match_module_record(struct dyn_ftrace *rec, char *mod, 
		return 1;

}



static void ftrace_match_module_records(char *buff, char *mod, int enable)

static int ftrace_match_module_records(char *buff, char *mod, int enable)

{

	unsigned search_len = 0;

	struct ftrace_page *pg;
@@ -1789,6 +1793,7 @@ static void ftrace_match_module_records(char *buff, char *mod, int enable) 
	char *search = buff;

	unsigned long flag;

	int not = 0;

	int found = 0;



	flag = enable ? FTRACE_FL_FILTER : FTRACE_FL_NOTRACE;
@@ -1819,12 +1824,15 @@ static void ftrace_match_module_records(char *buff, char *mod, int enable) 
				rec->flags &= ~flag;

			else

				rec->flags |= flag;

			found = 1;

		}

		if (enable && (rec->flags & FTRACE_FL_FILTER))

			ftrace_filtered = 1;



	} while_for_each_ftrace_rec();

	mutex_unlock(&ftrace_lock);



	return found;

}



/*
@@ -1853,8 +1861,9 @@ ftrace_mod_callback(char *func, char *cmd, char *param, int enable) 
	if (!strlen(mod))

		return -EINVAL;



	ftrace_match_module_records(func, mod, enable);

	if (ftrace_match_module_records(func, mod, enable))

		return 0;

	return -EINVAL;

}



static struct ftrace_func_command ftrace_mod_cmd = {
@@ -2151,8 +2160,9 @@ static int ftrace_process_regex(char *buff, int len, int enable) 
	func = strsep(&next, ":");



	if (!next) {

		ftrace_match_records(func, len, enable);

		if (ftrace_match_records(func, len, enable))

			return 0;

		return ret;

	}



	/* command found */
@@ -2198,10 +2208,9 @@ ftrace_regex_write(struct file *file, const char __user *ubuf, 
	    !trace_parser_cont(parser)) {

		ret = ftrace_process_regex(parser->buffer,

					   parser->idx, enable);

		trace_parser_clear(parser);

		if (ret)

			goto out_unlock;



		trace_parser_clear(parser);

	}



	ret = read;
@@ -2543,11 +2552,10 @@ ftrace_set_func(unsigned long *array, int *idx, char *buffer) 
					exists = true;

					break;

				}

			if (!exists) {

			if (!exists)

				array[(*idx)++] = rec->ip;

			found = 1;

		}

		}

	} while_for_each_ftrace_rec();



	mutex_unlock(&ftrace_lock);