Commit f51b452b authored by Arnd Bergmann's avatar Arnd Bergmann
Browse files

tracing: don't trace the BKL 



No reason to trace it when the last user is gone.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
parent 4688a066

include/trace/events/bkl.h

deleted100644 → 0
+0 −61
Original line number Diff line number Diff line 
#undef TRACE_SYSTEM

#define TRACE_SYSTEM bkl



#if !defined(_TRACE_BKL_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_BKL_H



#include <linux/tracepoint.h>



TRACE_EVENT(lock_kernel,



	TP_PROTO(const char *func, const char *file, int line),



	TP_ARGS(func, file, line),



	TP_STRUCT__entry(

		__field(	int,		depth			)

		__field_ext(	const char *,	func, FILTER_PTR_STRING	)

		__field_ext(	const char *,	file, FILTER_PTR_STRING	)

		__field(	int,		line			)

	),



	TP_fast_assign(

		/* We want to record the lock_depth after lock is acquired */

		__entry->depth = current->lock_depth + 1;

		__entry->func = func;

		__entry->file = file;

		__entry->line = line;

	),



	TP_printk("depth=%d file:line=%s:%d func=%s()", __entry->depth,

		  __entry->file, __entry->line, __entry->func)

);



TRACE_EVENT(unlock_kernel,



	TP_PROTO(const char *func, const char *file, int line),



	TP_ARGS(func, file, line),



	TP_STRUCT__entry(

		__field(int,		depth		)

		__field(const char *,	func		)

		__field(const char *,	file		)

		__field(int,		line		)

	),



	TP_fast_assign(

		__entry->depth = current->lock_depth;

		__entry->func = func;

		__entry->file = file;

		__entry->line = line;

	),



	TP_printk("depth=%d file:line=%s:%d func=%s()", __entry->depth,

		  __entry->file, __entry->line, __entry->func)

);



#endif /* _TRACE_BKL_H */



/* This part must be outside protection */

#include <trace/define_trace.h>

lib/kernel_lock.c

+0 −7
Original line number Diff line number Diff line
@@ -10,9 +10,6 @@ 
#include <linux/semaphore.h>

#include <linux/smp_lock.h>



#define CREATE_TRACE_POINTS

#include <trace/events/bkl.h>



/*

 * The 'big kernel lock'

 *
@@ -120,8 +117,6 @@ void __lockfunc _lock_kernel(const char *func, const char *file, int line) 
{

	int depth = current->lock_depth + 1;



	trace_lock_kernel(func, file, line);



	if (likely(!depth)) {

		might_sleep();

		__lock_kernel();
@@ -134,8 +129,6 @@ void __lockfunc _unlock_kernel(const char *func, const char *file, int line) 
	BUG_ON(current->lock_depth < 0);

	if (likely(--current->lock_depth < 0))

		__unlock_kernel();



	trace_unlock_kernel(func, file, line);

}



EXPORT_SYMBOL(_lock_kernel);