From: Ingo Molnar <mingo@kernel.org>
Date: Fri, 27 Mar 2015 09:04:06 +0000 (+0100)
Subject: Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck... 
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4bfe186dbe0a058680e4bfb0d673194f0ceaffd4;p=linux-beck.git

Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu

Pull RCU updates from Paul E. McKenney:

  - Documentation updates.

  - Changes permitting use of call_rcu() and friends very early in
    boot, for example, before rcu_init() is invoked.

  - Miscellaneous fixes.

  - Add in-kernel API to enable and disable expediting of normal RCU
    grace periods.

  - Improve RCU's handling of (hotplug-) outgoing CPUs.

    Note: ARM support is lagging a bit here, and these improved
    diagnostics might generate (harmless) splats.

  - NO_HZ_FULL_SYSIDLE fixes.

  - Tiny RCU updates to make it more tiny.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

4bfe186dbe0a058680e4bfb0d673194f0ceaffd4
diff --cc kernel/sched/idle.c
index 80014a178342,b0090accfb5b..d27d36476dca
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@@ -195,21 -196,10 +195,23 @@@ exit_idle
  
  	rcu_idle_exit();
  	start_critical_timings();
 +	return;
 +
 +use_default:
 +	/*
 +	 * We can't use the cpuidle framework, let's use the default
 +	 * idle routine.
 +	 */
 +	if (current_clr_polling_and_test())
 +		local_irq_enable();
 +	else
 +		arch_cpu_idle();
 +
 +	goto exit_idle;
  }
  
+ DEFINE_PER_CPU(bool, cpu_dead_idle);
+ 
  /*
   * Generic idle loop implementation
   *