tracing: don't trace the BKL
No reason to trace it when the last user is gone. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
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@ -1,61 +0,0 @@
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM bkl
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#if !defined(_TRACE_BKL_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_BKL_H
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#include <linux/tracepoint.h>
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TRACE_EVENT(lock_kernel,
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TP_PROTO(const char *func, const char *file, int line),
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TP_ARGS(func, file, line),
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TP_STRUCT__entry(
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__field( int, depth )
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__field_ext( const char *, func, FILTER_PTR_STRING )
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__field_ext( const char *, file, FILTER_PTR_STRING )
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__field( int, line )
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),
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TP_fast_assign(
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/* We want to record the lock_depth after lock is acquired */
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__entry->depth = current->lock_depth + 1;
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__entry->func = func;
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__entry->file = file;
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__entry->line = line;
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),
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TP_printk("depth=%d file:line=%s:%d func=%s()", __entry->depth,
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__entry->file, __entry->line, __entry->func)
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);
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TRACE_EVENT(unlock_kernel,
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TP_PROTO(const char *func, const char *file, int line),
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TP_ARGS(func, file, line),
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TP_STRUCT__entry(
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__field(int, depth )
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__field(const char *, func )
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__field(const char *, file )
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__field(int, line )
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),
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TP_fast_assign(
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__entry->depth = current->lock_depth;
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__entry->func = func;
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__entry->file = file;
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__entry->line = line;
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),
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TP_printk("depth=%d file:line=%s:%d func=%s()", __entry->depth,
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__entry->file, __entry->line, __entry->func)
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);
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#endif /* _TRACE_BKL_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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@ -10,9 +10,6 @@
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#include <linux/semaphore.h>
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#include <linux/smp_lock.h>
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#define CREATE_TRACE_POINTS
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#include <trace/events/bkl.h>
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/*
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* The 'big kernel lock'
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*
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@ -120,8 +117,6 @@ void __lockfunc _lock_kernel(const char *func, const char *file, int line)
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{
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int depth = current->lock_depth + 1;
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trace_lock_kernel(func, file, line);
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if (likely(!depth)) {
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might_sleep();
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__lock_kernel();
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@ -134,8 +129,6 @@ void __lockfunc _unlock_kernel(const char *func, const char *file, int line)
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BUG_ON(current->lock_depth < 0);
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if (likely(--current->lock_depth < 0))
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__unlock_kernel();
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trace_unlock_kernel(func, file, line);
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}
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EXPORT_SYMBOL(_lock_kernel);
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