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a8d154b009
This patch lowers the number of places a developer must modify to add new tracepoints. The current method to add a new tracepoint into an existing system is to write the trace point macro in the trace header with one of the macros TRACE_EVENT, TRACE_FORMAT or DECLARE_TRACE, then they must add the same named item into the C file with the macro DEFINE_TRACE(name) and then add the trace point. This change cuts out the needing to add the DEFINE_TRACE(name). Every file that uses the tracepoint must still include the trace/<type>.h file, but the one C file must also add a define before the including of that file. #define CREATE_TRACE_POINTS #include <trace/mytrace.h> This will cause the trace/mytrace.h file to also produce the C code necessary to implement the trace point. Note, if more than one trace/<type>.h is used to create the C code it is best to list them all together. #define CREATE_TRACE_POINTS #include <trace/foo.h> #include <trace/bar.h> #include <trace/fido.h> Thanks to Mathieu Desnoyers and Christoph Hellwig for coming up with the cleaner solution of the define above the includes over my first design to have the C code include a "special" header. This patch converts sched, irq and lockdep and skb to use this new method. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Zhao Lei <zhaolei@cn.fujitsu.com> Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
#if !defined(_TRACE_LOCKDEP_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_LOCKDEP_H
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#include <linux/lockdep.h>
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#include <linux/tracepoint.h>
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM lock
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#ifdef CONFIG_LOCKDEP
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TRACE_FORMAT(lock_acquire,
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TP_PROTO(struct lockdep_map *lock, unsigned int subclass,
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int trylock, int read, int check,
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struct lockdep_map *next_lock, unsigned long ip),
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TP_ARGS(lock, subclass, trylock, read, check, next_lock, ip),
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TP_FMT("%s%s%s", trylock ? "try " : "",
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read ? "read " : "", lock->name)
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);
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TRACE_FORMAT(lock_release,
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TP_PROTO(struct lockdep_map *lock, int nested, unsigned long ip),
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TP_ARGS(lock, nested, ip),
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TP_FMT("%s", lock->name)
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);
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#ifdef CONFIG_LOCK_STAT
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TRACE_FORMAT(lock_contended,
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TP_PROTO(struct lockdep_map *lock, unsigned long ip),
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TP_ARGS(lock, ip),
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TP_FMT("%s", lock->name)
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);
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TRACE_EVENT(lock_acquired,
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TP_PROTO(struct lockdep_map *lock, unsigned long ip, s64 waittime),
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TP_ARGS(lock, ip, waittime),
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TP_STRUCT__entry(
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__field(const char *, name)
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__field(unsigned long, wait_usec)
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__field(unsigned long, wait_nsec_rem)
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),
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TP_fast_assign(
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__entry->name = lock->name;
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__entry->wait_nsec_rem = do_div(waittime, NSEC_PER_USEC);
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__entry->wait_usec = (unsigned long) waittime;
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),
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TP_printk("%s (%lu.%03lu us)", __entry->name, __entry->wait_usec,
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__entry->wait_nsec_rem)
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);
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#endif
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#endif
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#endif /* _TRACE_LOCKDEP_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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