On Fri, Jun 22, 2018 at 12:27:17PM +1000, Stephen Rothwell wrote:
> 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.
Looks good to me, and thank you!
Thanx, Paul
> --
> 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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