linux-kernel - linux-next: manual merge of the rcu tree with the tip tree

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Date:	Wed, 22 Aug 2012 14:27:35 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: linux-next: manual merge of the rcu tree with the tip tree

Hi Paul,

Today's linux-next merge of the rcu tree got a conflict in
kernel/rcutree.h between commit 62ab7072476a ("rcu: Use
smp_hotplug_thread facility for RCUs per-CPU kthread") from the tip tree
and commit daa5d37ff51b ("rcu: Prevent force_quiescent_state() memory
contention") from the rcu tree.

Just context changes (I think).  I fixed it up (see below) and can carry
the fix as necessary.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

diff --cc kernel/rcutree.h
index 1224d4c,c2a3e7d..0000000
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@@ -196,6 -200,13 +200,7 @@@ struct rcu_node 
  				/* Refused to boost: not sure why, though. */
  				/*  This can happen due to race conditions. */
  #endif /* #ifdef CONFIG_RCU_BOOST */
 -	struct task_struct *node_kthread_task;
 -				/* kthread that takes care of this rcu_node */
 -				/*  structure, for example, awakening the */
 -				/*  per-CPU kthreads as needed. */
 -	unsigned int node_kthread_status;
 -				/* State of node_kthread_task for tracing. */
+ 	raw_spinlock_t fqslock ____cacheline_internodealigned_in_smp;
  } ____cacheline_internodealigned_in_smp;
  
  /*

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