[PATCH 1/7] nohz: Add more comment about CONFIG_NO_HZ

[Frederic Weisbecker <fweisbec@gmail.com>]

In order to prepare for adding a new config to implement
adaptive tickless, clarify that CONFIG_NO_HZ alone only
stops the tick on idle.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Alessio Igor Bogani <abogani@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Avi Kivity <avi@redhat.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
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@ti.com>
Cc: Max Krasnyansky <maxk@qualcomm.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Sven-Thorsten Dietrich <thebigcorporation@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/time/Kconfig |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig
index fd42bd4..0883fa1 100644
--- a/kernel/time/Kconfig
+++ b/kernel/time/Kconfig
@@ -58,13 +58,12 @@ config TICK_ONESHOT
 	bool
 
 config NO_HZ
-	bool "Tickless System (Dynamic Ticks)"
+	bool "Tickless idle system (Dynamic idle Ticks)"
 	depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS
 	select TICK_ONESHOT
 	help
-	  This option enables a tickless system: timer interrupts will
-	  only trigger on an as-needed basis both when the system is
-	  busy and when the system is idle.
+	  This option enables a tickless idle system: timer interrupts will
+	  only trigger on an as-needed basis when the system is idle.
 
 config HIGH_RES_TIMERS
 	bool "High Resolution Timer Support"
-- 
1.7.5.4