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>
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
#if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_IRQ_H
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#include <linux/tracepoint.h>
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#include <linux/interrupt.h>
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM irq
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/*
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* Tracepoint for entry of interrupt handler:
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*/
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TRACE_FORMAT(irq_handler_entry,
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TP_PROTO(int irq, struct irqaction *action),
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TP_ARGS(irq, action),
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TP_FMT("irq=%d handler=%s", irq, action->name)
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);
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/*
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* Tracepoint for return of an interrupt handler:
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*/
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TRACE_EVENT(irq_handler_exit,
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TP_PROTO(int irq, struct irqaction *action, int ret),
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TP_ARGS(irq, action, ret),
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TP_STRUCT__entry(
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__field( int, irq )
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__field( int, ret )
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),
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TP_fast_assign(
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__entry->irq = irq;
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__entry->ret = ret;
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),
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TP_printk("irq=%d return=%s",
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__entry->irq, __entry->ret ? "handled" : "unhandled")
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);
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TRACE_FORMAT(softirq_entry,
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TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
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TP_ARGS(h, vec),
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TP_FMT("softirq=%d action=%s", (int)(h - vec), softirq_to_name[h-vec])
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);
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TRACE_FORMAT(softirq_exit,
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TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
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TP_ARGS(h, vec),
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TP_FMT("softirq=%d action=%s", (int)(h - vec), softirq_to_name[h-vec])
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);
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#endif /* _TRACE_IRQ_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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