Commit f51b452b authored by Arnd Bergmann's avatar Arnd Bergmann

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
#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>
......@@ -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);
......
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