linux-kernel - Re: linux-next: manual merge of the powerpc tree with the dma-mapping tree

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Date:   Fri, 22 Feb 2019 13:49:46 +0100
From:   Christoph Hellwig <hch@....de>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        PowerPC <linuxppc-dev@...ts.ozlabs.org>,
        Christoph Hellwig <hch@....de>,
        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 powerpc tree with the
 dma-mapping tree

On Fri, Feb 22, 2019 at 02:43:41PM +1100, Michael Ellerman wrote:
> Stephen Rothwell <sfr@...b.auug.org.au> writes:
> 
> > Hi all,
> >
> > Today's linux-next merge of the powerpc tree got a conflict in:
> >
> >   arch/powerpc/kernel/dma-swiotlb.c
> >
> > between commit:
> >
> >   cfced786969c ("dma-mapping: remove the default map_resource implementation")
> >
> > from the dma-mapping tree and commit:
> >
> >   68005b67d15a ("powerpc/dma: use the generic direct mapping bypass")
> >
> > from the powerpc tree.
> >
> > I fixed it up (I just used the latter) 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.
> 
> Thanks.
> 
> Christoph, I've put the powerpc dma changes in a topic branch if you
> want to merge it to reduce the conflicts. Up to you.

Thanks.  I think the conflicts are pretty harmless as we are mostly
removing code entirely in the powerpc tree that the dma-mapping tree
touches.