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Commit 73285527 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar
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x86/tracing: Build tracepoints only when they are used 



The tracepoint macro magic emits code for all tracepoints in a event header
file. That code stays around even if the tracepoint is not used at all. The
linker does not discard it.

Build the various irq_vector tracepoints dependent on the appropriate CONFIG
switches.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20170828064957.770651777@linutronix.de


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent a45525b5

arch/x86/include/asm/trace/irq_vectors.h

+24 −12
Original line number Diff line number Diff line
@@ -7,6 +7,8 @@ 
#include <linux/tracepoint.h>

#include <asm/trace/common.h>



#ifdef CONFIG_X86_LOCAL_APIC



extern int trace_resched_ipi_reg(void);

extern void trace_resched_ipi_unreg(void);
@@ -52,18 +54,6 @@ DEFINE_EVENT_FN(x86_irq_vector, name##_exit, \ 
 */

DEFINE_IRQ_VECTOR_EVENT(local_timer);



/*

 * The ifdef is required because that tracepoint macro hell emits tracepoint

 * code in files which include this header even if the tracepoint is not

 * enabled. Brilliant stuff that.

 */

#ifdef CONFIG_SMP

/*

 * reschedule - called when entering/exiting a reschedule vector handler

 */

DEFINE_RESCHED_IPI_EVENT(reschedule);

#endif



/*

 * spurious_apic - called when entering/exiting a spurious apic vector handler

 */
@@ -80,6 +70,7 @@ DEFINE_IRQ_VECTOR_EVENT(error_apic); 
 */

DEFINE_IRQ_VECTOR_EVENT(x86_platform_ipi);



#ifdef CONFIG_IRQ_WORK

/*

 * irq_work - called when entering/exiting a irq work interrupt

 * vector handler
@@ -96,6 +87,18 @@ DEFINE_IRQ_VECTOR_EVENT(irq_work); 
 *  4) goto 1

 */

TRACE_EVENT_PERF_PERM(irq_work_exit, is_sampling_event(p_event) ? -EPERM : 0);

#endif



/*

 * The ifdef is required because that tracepoint macro hell emits tracepoint

 * code in files which include this header even if the tracepoint is not

 * enabled. Brilliant stuff that.

 */

#ifdef CONFIG_SMP

/*

 * reschedule - called when entering/exiting a reschedule vector handler

 */

DEFINE_RESCHED_IPI_EVENT(reschedule);



/*

 * call_function - called when entering/exiting a call function interrupt
@@ -108,24 +111,33 @@ DEFINE_IRQ_VECTOR_EVENT(call_function); 
 * single interrupt vector handler

 */

DEFINE_IRQ_VECTOR_EVENT(call_function_single);

#endif



#ifdef CONFIG_X86_MCE_THRESHOLD

/*

 * threshold_apic - called when entering/exiting a threshold apic interrupt

 * vector handler

 */

DEFINE_IRQ_VECTOR_EVENT(threshold_apic);

#endif



#ifdef CONFIG_X86_MCE_AMD

/*

 * deferred_error_apic - called when entering/exiting a deferred apic interrupt

 * vector handler

 */

DEFINE_IRQ_VECTOR_EVENT(deferred_error_apic);

#endif



#ifdef CONFIG_X86_THERMAL_VECTOR

/*

 * thermal_apic - called when entering/exiting a thermal apic interrupt

 * vector handler

 */

DEFINE_IRQ_VECTOR_EVENT(thermal_apic);

#endif



#endif /* CONFIG_X86_LOCAL_APIC */



#undef TRACE_INCLUDE_PATH

#define TRACE_INCLUDE_PATH .