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[for-next,2/7] tracing: always define trace_{irq,preempt}_{enable_disable}

Message ID 20171213204737.338950499@goodmis.org
State Accepted
Commit 250d0c7754aa37c6443f07f1f5f591e2806295d8
Headers show
Series None | expand

Commit Message

Steven Rostedt Dec. 13, 2017, 8:46 p.m. UTC 
From: Arnd Bergmann <arnd@arndb.de>


We get a build error in the irqsoff tracer in some configurations:

kernel/trace/trace_irqsoff.c: In function 'trace_preempt_on':
kernel/trace/trace_irqsoff.c:855:2: error: implicit declaration of function 'trace_preempt_enable_rcuidle'; did you mean 'trace_irq_enable_rcuidle'? [-Werror=implicit-function-declaration]
  trace_preempt_enable_rcuidle(a0, a1);

The problem is that trace_preempt_enable_rcuidle() has different
definition based on multiple Kconfig symbols, but not all combinations
have a valid definition.

This changes the conditions so that we always get exactly one
definition of each of the four tracing macros. I have not tried
to verify that these definitions are sensible, but now we
can build all randconfig combinations again.

Link: http://lkml.kernel.org/r/20171019083230.2450779-1-arnd@arndb.de

Fixes: d59158162e03 ("tracing: Add support for preempt and irq enable/disable events")
Acked-by: Joel Fernandes <joelaf@google.com>

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

---
 include/trace/events/preemptirq.h | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

-- 
2.13.2
diff mbox series

Patch

diff --git a/include/trace/events/preemptirq.h b/include/trace/events/preemptirq.h
index f5024c560d8f..9c4eb33c5a1d 100644
--- a/include/trace/events/preemptirq.h
+++ b/include/trace/events/preemptirq.h
@@ -56,15 +56,18 @@  DEFINE_EVENT(preemptirq_template, preempt_enable,
 
 #include <trace/define_trace.h>
 
-#else /* !CONFIG_PREEMPTIRQ_EVENTS */
+#endif /* !CONFIG_PREEMPTIRQ_EVENTS */
 
+#if !defined(CONFIG_PREEMPTIRQ_EVENTS) || defined(CONFIG_PROVE_LOCKING)
 #define trace_irq_enable(...)
 #define trace_irq_disable(...)
-#define trace_preempt_enable(...)
-#define trace_preempt_disable(...)
 #define trace_irq_enable_rcuidle(...)
 #define trace_irq_disable_rcuidle(...)
+#endif
+
+#if !defined(CONFIG_PREEMPTIRQ_EVENTS) || !defined(CONFIG_DEBUG_PREEMPT)
+#define trace_preempt_enable(...)
+#define trace_preempt_disable(...)
 #define trace_preempt_enable_rcuidle(...)
 #define trace_preempt_disable_rcuidle(...)
-
 #endif