linux-sg2042/arch/cris/kernel
Frederic Weisbecker c633f9e788 cris: 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 Cris's idle loop.

Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Cris <linux-cris-kernel@axis.com>
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 07:44:44 -07:00
..
Makefile arm, cris, mips, sparc, powerpc, um, xtensa: fix build with bash 4.0 2009-09-20 12:28:22 +02:00
asm-offsets.c drop explicit include of autoconf.h 2009-12-12 13:08:15 +01:00
crisksyms.c Generic semaphore implementation 2008-04-17 10:42:34 -04:00
irq.c Disintegrate asm/system.h for CRIS 2012-03-28 18:30:02 +01:00
module.c modules: make arch's use default loader hooks 2011-07-24 22:06:04 +09:30
process.c cris: Add missing RCU idle APIs on idle loop 2012-09-23 07:44:44 -07:00
profile.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
ptrace.c move key_repace_session_keyring() into tracehook_notify_resume() 2012-05-23 22:09:20 -04:00
setup.c Disintegrate asm/system.h for CRIS 2012-03-28 18:30:02 +01:00
sys_cris.c Add generic sys_ipc wrapper 2010-03-12 15:52:32 -08:00
time.c CRIS: Remove legacy RTC drivers 2012-04-05 11:55:58 +02:00
traps.c Disintegrate asm/system.h for CRIS 2012-03-28 18:30:02 +01:00
vmlinux.lds.S CRIS: Add _sdata to vmlinux.lds.S 2012-04-03 13:26:33 +02:00