[GIT PULL] nohz: Fixlet and Kconfig cleanup

[GIT PULL] nohz: Fixlet and Kconfig cleanup

[Frederic Weisbecker]

Ingo,

Please pull the latest nohz branch from:

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
	timers/nohz

HEAD: 65e709dc0c25dbd563861924815e9a3a93878b75

Thanks.

---
Frederic Weisbecker (2):
  nohz: Fix unavailable tick_stop tracepoint in dynticks idle
  nohz: Remove full dynticks' superfluous dependency on RCU tree

 include/trace/events/timer.h |    2 +-
 kernel/time/Kconfig          |    2 --
 2 files changed, 1 insertions(+), 3 deletions(-)

-- 
1.7.5.4

[PATCH 1/2] nohz: Fix unavailable tick_stop tracepoint in dynticks idle

[Frederic Weisbecker]

The trace_tick_stop() tracepoint is only available in full
dynticks. But it's also used by dynticks-idle so let's build
it for the latter config as well.

This fixes:

     kernel/time/tick-sched.c: In function tick_nohz_stop_sched_tick:
     kernel/time/tick-sched.c:644: error: implicit declaration of function trace_tick_stop
     make[2]: *** [kernel/time/tick-sched.o] Erreur 1

Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Gilad Ben Yossef <gilad@benyossef.com>
Cc: Hakan Akkan <hakanakkan@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
---
 include/trace/events/timer.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/trace/events/timer.h b/include/trace/events/timer.h
index f5eb53e..e967dd8 100644
--- a/include/trace/events/timer.h
+++ b/include/trace/events/timer.h
@@ -323,7 +323,7 @@ TRACE_EVENT(itimer_expire,
 		  (int) __entry->pid, (unsigned long long)__entry->now)
 );
 
-#ifdef CONFIG_NO_HZ_FULL
+#ifdef CONFIG_NO_HZ_COMMON
 TRACE_EVENT(tick_stop,
 
 	TP_PROTO(int success, char *error_msg),
-- 
1.7.5.4

[PATCH 2/2] nohz: Remove full dynticks' superfluous dependency on RCU tree

[Frederic Weisbecker]

Remove the dependency on (TREE_RCU || TREE_PREEMPT_RCU). The full
dynticks option already depends on SMP which implies
(whatever flavour of) RCU tree config anyway.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Gilad Ben Yossef <gilad@benyossef.com>
Cc: Hakan Akkan <hakanakkan@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/time/Kconfig |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig
index e1ac129..1ea2bba 100644
--- a/kernel/time/Kconfig
+++ b/kernel/time/Kconfig
@@ -104,8 +104,6 @@ config NO_HZ_FULL
 	depends on SMP
 	# RCU_USER_QS dependency
 	depends on HAVE_CONTEXT_TRACKING
-	# RCU_NOCB_CPU dependency
-	depends on TREE_RCU || TREE_PREEMPT_RCU
 	depends on VIRT_CPU_ACCOUNTING_GEN
 	select NO_HZ_COMMON
 	select RCU_USER_QS
-- 
1.7.5.4

Re: [PATCH 1/2] nohz: Fix unavailable tick_stop tracepoint in dynticks idle

[David Rientjes]

On Wed, 24 Apr 2013, Frederic Weisbecker wrote:

> The trace_tick_stop() tracepoint is only available in full
> dynticks. But it's also used by dynticks-idle so let's build
> it for the latter config as well.
> 
> This fixes:
> 
>      kernel/time/tick-sched.c: In function tick_nohz_stop_sched_tick:
>      kernel/time/tick-sched.c:644: error: implicit declaration of function trace_tick_stop
>      make[2]: *** [kernel/time/tick-sched.o] Erreur 1
> 
> Reported-by: Ingo Molnar <mingo@kernel.org>
> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
> Cc: Chris Metcalf <cmetcalf@tilera.com>
> Cc: Christoph Lameter <cl@linux.com>
> Cc: Geoff Levand <geoff@infradead.org>
> Cc: Gilad Ben Yossef <gilad@benyossef.com>
> Cc: Hakan Akkan <hakanakkan@gmail.com>
> Cc: Ingo Molnar <mingo@kernel.org>
> Cc: Kevin Hilman <khilman@linaro.org>
> Cc: Li Zhong <zhong@linux.vnet.ibm.com>
> Cc: Oleg Nesterov <oleg@redhat.com>
> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
> Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Steven Rostedt <rostedt@goodmis.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>

Acked-by: David Rientjes <rientjes@google.com>

Fixes all of the build errors I've detected in timers/nohz.