From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue, 30 Apr 2013 14:39:01 +0000 (-0700)
Subject: Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git... 
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1f889ec62c3f0d8913f3c32f9aff2a1e15099346;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

Merge branch 'core-rcu-for-linus' of git://git./linux/kernel/git/tip/tip

Pull RCU updates from Ingo Molnar:
 "The main changes in this cycle are mostly related to preparatory work
  for the full-dynticks work:

   - Remove restrictions on no-CBs CPUs, make RCU_FAST_NO_HZ take
     advantage of numbered callbacks, do callback accelerations based on
     numbered callbacks.  Posted to LKML at
        https://lkml.org/lkml/2013/3/18/960

   - RCU documentation updates.  Posted to LKML at
        https://lkml.org/lkml/2013/3/18/570

   - Miscellaneous fixes.  Posted to LKML at
        https://lkml.org/lkml/2013/3/18/594"

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
  rcu: Make rcu_accelerate_cbs() note need for future grace periods
  rcu: Abstract rcu_start_future_gp() from rcu_nocb_wait_gp()
  rcu: Rename n_nocb_gp_requests to need_future_gp
  rcu: Push lock release to rcu_start_gp()'s callers
  rcu: Repurpose no-CBs event tracing to future-GP events
  rcu: Rearrange locking in rcu_start_gp()
  rcu: Make RCU_FAST_NO_HZ take advantage of numbered callbacks
  rcu: Accelerate RCU callbacks at grace-period end
  rcu: Export RCU_FAST_NO_HZ parameters to sysfs
  rcu: Distinguish "rcuo" kthreads by RCU flavor
  rcu: Add event tracing for no-CBs CPUs' grace periods
  rcu: Add event tracing for no-CBs CPUs' callback registration
  rcu: Introduce proper blocking to no-CBs kthreads GP waits
  rcu: Provide compile-time control for no-CBs CPUs
  rcu: Tone down debugging during boot-up and shutdown.
  rcu: Add softirq-stall indications to stall-warning messages
  rcu: Documentation update
  rcu: Make bugginess of code sample more evident
  rcu: Fix hlist_bl_set_first_rcu() annotation
  rcu: Delete unused rcu_node "wakemask" field
  ...
---

1f889ec62c3f0d8913f3c32f9aff2a1e15099346
diff --cc kernel/rcutree.c
index 2f8530bc4b17,2d5f94c1c7fb..d8534308fd05
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@@ -1319,7 -1441,8 +1441,8 @@@ static int rcu_gp_init(struct rcu_stat
  					    rnp->grphi, rnp->qsmask);
  		raw_spin_unlock_irq(&rnp->lock);
  #ifdef CONFIG_PROVE_RCU_DELAY
- 		if ((prandom_u32() % (rcu_num_nodes * 8)) == 0)
 -		if ((random32() % (rcu_num_nodes * 8)) == 0 &&
++		if ((prandom_u32() % (rcu_num_nodes * 8)) == 0 &&
+ 		    system_state == SYSTEM_RUNNING)
  			schedule_timeout_uninterruptible(2);
  #endif /* #ifdef CONFIG_PROVE_RCU_DELAY */
  		cond_resched();