linux/arch/m32r
Frederic Weisbecker 48ae077cfc m32r: Add missing RCU idle APIs on idle loop
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 m32r's idle loop.

Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: <stable@vger.kernel.org> # 3.3+
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2012-09-23 07:44:47 -07:00
..
boot m32r: make memset() global for CONFIG_KERNEL_BZIP2=y 2012-07-17 16:21:30 -07:00
configs kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
include/asm ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION 2012-07-30 17:25:21 -07:00
kernel m32r: Add missing RCU idle APIs on idle loop 2012-09-23 07:44:47 -07:00
lib m32r: export delay loop symbols 2009-10-04 12:02:36 +09:00
mm Disintegrate asm/system.h for M32R 2012-03-28 18:30:02 +01:00
oprofile oprofile: more whitespace fixes 2008-10-15 20:55:51 +02:00
platforms Disintegrate asm/system.h for M32R 2012-03-28 18:30:02 +01:00
Kconfig ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION 2012-07-30 17:25:21 -07:00
Kconfig.debug lib: consolidate DEBUG_STACK_USAGE option 2011-05-25 08:39:54 -07:00
Makefile m32r: Use generic init_task 2012-05-05 13:00:23 +02:00