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

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Message-ID: <20180622122717.5f475829@canb.auug.org.au>
Date:   Fri, 22 Jun 2018 12:27:17 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: linux-next: manual merge of the rcu tree with the tip tree

Hi all,

Today's linux-next merge of the rcu tree got a conflict in:

  kernel/rcu/tree_plugin.h

between commit:

  b3dae109fa89 ("sched/swait: Rename to exclusive")

from the tip tree and commit:

  57ada0a7f942 ("rcu: Convert grace-period requests to ->gp_seq")

from the rcu tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc kernel/rcu/tree_plugin.h
index ad53d133f709,2cc9bf0d363a..000000000000
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@@ -2082,9 -2159,9 +2159,9 @@@ static void rcu_nocb_wait_gp(struct rcu
  	 */
  	trace_rcu_this_gp(rnp, rdp, c, TPS("StartWait"));
  	for (;;) {
 -		swait_event_interruptible(
 +		swait_event_interruptible_exclusive(
- 			rnp->nocb_gp_wq[c & 0x1],
- 			(d = ULONG_CMP_GE(READ_ONCE(rnp->completed), c)));
+ 			rnp->nocb_gp_wq[rcu_seq_ctr(c) & 0x1],
+ 			(d = rcu_seq_done(&rnp->gp_seq, c)));
  		if (likely(d))
  			break;
  		WARN_ON(signal_pending(current));

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