Frederic Weisbecker 2ddcad1f01 xtensa: Add missing RCU idle APIs on idle loop ... commit 11ad47a0ed upstream. In the old times, the whole idle task was considered as an RCU quiescent state. But as RCU became more and more successful overtime, some RCU read side critical section have been added even in the code of some architectures idle tasks, for tracing for example. So nowadays, rcu_idle_enter() and rcu_idle_exit() must be called by the architecture to tell RCU about the part in the idle loop that doesn't make use of rcu read side critical sections, typically the part that puts the CPU in low power mode. This is necessary for RCU to find the quiescent states in idle in order to complete grace periods. Add this missing pair of calls in the xtensa's idle loop. Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2012-10-13 05:38:54 +09:00
..
boot	xtensa: change to new flag variable	2011-03-17 14:02:57 +01:00
configs	locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage	2012-03-23 13:18:57 +01:00
include/asm	xtensa: fix build fail on undefined ack_bad_irq	2012-04-26 18:35:32 -04:00
kernel	xtensa: Add missing RCU idle APIs on idle loop	2012-10-13 05:38:54 +09:00
lib
mm	Disintegrate asm/system.h for Xtensa	2012-03-28 18:30:03 +01:00
platforms	TTY: remove serialP.h inclusion from some files	2012-03-08 11:47:02 -08:00
variants	XTENSA: static should be at beginning of declaration	2011-07-11 14:13:47 +02:00
Kconfig	cpu: Register a generic CPU device on architectures that currently do not	2012-01-11 15:50:11 -08:00
Kconfig.debug
Makefile	xtensa: Add -mforce-no-pic option is supported	2010-05-02 01:00:22 -07:00