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

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Date:   Wed, 24 Jun 2020 20:44:39 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: manual merge of the rcu tree with the tip tree

On Thu, Jun 25, 2020 at 12:44:52PM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> Today's linux-next merge of the rcu tree got a conflict in:
> 
>   include/linux/smp.h
> 
> between commit:
> 
>   380dc20ce843 ("smp, irq_work: Continue smp_call_function*() and irq_work*() integration")
> 
> from the tip tree and commit:
> 
>   7effc6f7b465 ("EXP kernel/smp: Provide CSD lock timeout diagnostics")
> 
> from the rcu tree.
> 
> I have no idea how to fix this up ...

I have an interesting forward-port in my future, it seems.

> I fixed it up (I just effectively reverted the rcu tree commit) 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.

For the time being, I will move this out of my rcu/next pile.

							Thanx, Paul