Markers - define non optimized marker
To support the forthcoming "immediate values" marker optimization, we must have a way to declare markers in few code paths that does not use instruction modification based enable. This will be the case of printk(), some traps and eventually lockdep instrumentation. Changelog : - Fix reversed boolean logic of "generic". Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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@ -58,8 +58,12 @@ struct marker {
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* Make sure the alignment of the structure in the __markers section will
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* not add unwanted padding between the beginning of the section and the
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* structure. Force alignment to the same alignment as the section start.
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*
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* The "generic" argument controls which marker enabling mechanism must be used.
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* If generic is true, a variable read is used.
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* If generic is false, immediate values are used.
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*/
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#define __trace_mark(name, call_private, format, args...) \
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#define __trace_mark(generic, name, call_private, format, args...) \
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do { \
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static const char __mstrtab_##name[] \
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__attribute__((section("__markers_strings"))) \
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@ -79,7 +83,7 @@ struct marker {
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extern void marker_update_probe_range(struct marker *begin,
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struct marker *end);
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#else /* !CONFIG_MARKERS */
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#define __trace_mark(name, call_private, format, args...) \
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#define __trace_mark(generic, name, call_private, format, args...) \
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__mark_check_format(format, ## args)
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static inline void marker_update_probe_range(struct marker *begin,
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struct marker *end)
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@ -87,15 +91,30 @@ static inline void marker_update_probe_range(struct marker *begin,
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#endif /* CONFIG_MARKERS */
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/**
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* trace_mark - Marker
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* trace_mark - Marker using code patching
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* @name: marker name, not quoted.
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* @format: format string
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* @args...: variable argument list
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*
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* Places a marker.
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* Places a marker using optimized code patching technique (imv_read())
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* to be enabled when immediate values are present.
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*/
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#define trace_mark(name, format, args...) \
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__trace_mark(name, NULL, format, ## args)
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__trace_mark(0, name, NULL, format, ## args)
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/**
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* _trace_mark - Marker using variable read
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* @name: marker name, not quoted.
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* @format: format string
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* @args...: variable argument list
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*
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* Places a marker using a standard memory read (_imv_read()) to be
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* enabled. Should be used for markers in code paths where instruction
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* modification based enabling is not welcome. (__init and __exit functions,
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* lockdep, some traps, printk).
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*/
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#define _trace_mark(name, format, args...) \
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__trace_mark(1, name, NULL, format, ## args)
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/**
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* MARK_NOARGS - Format string for a marker with no argument.
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