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From: Rob Herring <robh@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-xtensa@linux-xtensa.org,
	linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
	SH-Linux <linux-sh@vger.kernel.org>,
	devicetree@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	x86@kernel.org, linux-mips@vger.kernel.org,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Linux IOMMU <iommu@lists.linux-foundation.org>,
	linux-riscv@lists.infradead.org,
	arcml <linux-snps-arc@lists.infradead.org>,
	Lee Jones <lee.jones@linaro.org>,
	"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 06/12] dma-mapping: improve selection of dma_declare_coherent availability
Date: Wed, 13 Feb 2019 13:27:45 -0600
Message-ID: <CAL_JsqLCr4Jk_-cWUFGs5zfk+NKksc+bs0bpiBeQHsZFthaM1Q@mail.gmail.com> (raw)
In-Reply-To: <20190213182435.GA19906@lst.de>

On Wed, Feb 13, 2019 at 12:24 PM Christoph Hellwig <hch@lst.de> wrote:
>
> On Tue, Feb 12, 2019 at 02:40:23PM -0600, Rob Herring wrote:
> > > diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
> > > index 3607fd2810e4..f8c66a9472a4 100644
> > > --- a/drivers/of/Kconfig
> > > +++ b/drivers/of/Kconfig
> > > @@ -43,6 +43,7 @@ config OF_FLATTREE
> > >
> > >  config OF_EARLY_FLATTREE
> > >         bool
> > > +       select DMA_DECLARE_COHERENT
> >
> > Is selecting DMA_DECLARE_COHERENT okay on UML? We run the unittests with UML.
>
> No, that will fail with undefined references to memunmap.
>
> I gues this needs to be
>
>         select DMA_DECLARE_COHERENT if HAS_DMA
>
> > Maybe we should just get rid of OF_RESERVED_MEM. If we support booting
> > from DT, then it should always be enabled anyways.
>
> Fine with me.  Do you want me to respin the series to just remove
> it?

Either now or it can wait. I don't want to hold this up any.

Rob

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Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-11 13:35 dma_declare_coherent spring cleaning Christoph Hellwig
2019-02-11 13:35 ` [PATCH 01/12] mfd/sm501: depend on HAS_DMA Christoph Hellwig
2019-02-13  7:29   ` Lee Jones
2019-02-13 18:17     ` Christoph Hellwig
2019-02-11 13:35 ` [PATCH 02/12] device.h: dma_mem is only needed for HAVE_GENERIC_DMA_COHERENT Christoph Hellwig
2019-02-12  7:49   ` Greg Kroah-Hartman
2019-02-11 13:35 ` [PATCH 03/12] of: mark early_init_dt_alloc_reserved_memory_arch static Christoph Hellwig
2019-02-12 20:24   ` Rob Herring
2019-02-13 18:16     ` Christoph Hellwig
2019-02-11 13:35 ` [PATCH 04/12] of: select OF_RESERVED_MEM automatically Christoph Hellwig
2019-02-12 20:11   ` Rob Herring
2019-02-11 13:35 ` [PATCH 05/12] dma-mapping: remove an incorrect __iommem annotation Christoph Hellwig
2019-02-11 13:35 ` [PATCH 06/12] dma-mapping: improve selection of dma_declare_coherent availability Christoph Hellwig
2019-02-12  2:17   ` Paul Burton
2019-02-12  7:49   ` Greg Kroah-Hartman
2019-02-12 20:40   ` Rob Herring
2019-02-13 18:24     ` Christoph Hellwig
2019-02-13 19:27       ` Rob Herring [this message]
2019-02-13  7:27   ` Lee Jones
2019-02-11 13:35 ` [PATCH 07/12] dma-mapping: move CONFIG_DMA_CMA to kernel/dma/Kconfig Christoph Hellwig
2019-02-12  7:50   ` Greg Kroah-Hartman
2019-02-11 13:35 ` [PATCH 08/12] dma-mapping: remove dma_mark_declared_memory_occupied Christoph Hellwig
2019-02-11 13:35 ` [PATCH 09/12] dma-mapping: remove the DMA_MEMORY_EXCLUSIVE flag Christoph Hellwig
2019-02-12  7:50   ` Greg Kroah-Hartman
2019-02-11 13:35 ` [PATCH 10/12] dma-mapping: simplify allocations from per-device coherent memory Christoph Hellwig
2019-02-11 13:35 ` [PATCH 11/12] dma-mapping: handle per-device coherent memory mmap in common code Christoph Hellwig
2019-02-11 13:35 ` [PATCH 12/12] dma-mapping: remove dma_assign_coherent_memory Christoph Hellwig

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