From: Mark Brown <broonie@kernel.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Christoph Hellwig <hch@lst.de>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Robin Murphy <robin.murphy@arm.com>,
Arnd Bergmann <arnd@arndb.de>,
Richard Weinberger <richard@nod.at>,
Felipe Balbi <balbi@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"James E . J . Bottomley" <jejb@linux.vnet.ibm.com>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
iommu@lists.linux-foundation.org, linux-usb@vger.kernel.org,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org
Subject: Re: [PATCH/RFC 0/6] Allow compile-testing NO_DMA
Date: Tue, 6 Feb 2018 12:01:02 +0000 [thread overview]
Message-ID: <20180206120102.GD5681@sirena.org.uk> (raw)
In-Reply-To: <1517912092-15470-1-git-send-email-geert@linux-m68k.org>
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On Tue, Feb 06, 2018 at 11:14:46AM +0100, Geert Uytterhoeven wrote:
> The intention of this is twofold:
> 1. To catch users of the DMA API on systems that do no support the DMA
> mapping API,
> 2. To avoid building drivers that cannot work on such systems anyway.
>
> However, the disadvantage is that we have to keep on adding dependencies
> on HAS_DMA all over the place.
> Thanks to the COMPILE_TEST symbol, lots of drivers now depend on one or
> more platform dependencies (that imply HAS_DMA) || COMPILE_TEST, thus
> already covering intention #2. Having to add an explicit dependency on
> HAS_DMA here is cumbersome, and hinders compile-testing.
Thanks for doing this, hopefully it'll make everyone's life easier!
Reviwed-by: Mark Brown <broonie@kernel.org>
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next prev parent reply other threads:[~2018-02-06 12:01 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-06 10:14 [PATCH/RFC 0/6] Allow compile-testing NO_DMA Geert Uytterhoeven
2018-02-06 10:14 ` [PATCH/RFC 1/6] dma-mapping: Convert NO_DMA get_dma_ops() into a real dummy Geert Uytterhoeven
2018-02-06 10:14 ` [PATCH/RFC 2/6] dma-coherent: Add NO_DMA dummies for managed DMA API Geert Uytterhoeven
2018-02-06 10:14 ` [PATCH/RFC 3/6] usb: gadget: Add NO_DMA dummies for DMA mapping API Geert Uytterhoeven
2018-02-15 13:18 ` Felipe Balbi
2018-02-06 10:14 ` [PATCH/RFC 4/6] mm: Add NO_DMA dummies for DMA pool API Geert Uytterhoeven
2018-02-06 12:47 ` Robin Murphy
2018-02-06 10:14 ` [PATCH/RFC 5/6] scsi: Add NO_DMA dummies for SCSI DMA mapping API Geert Uytterhoeven
2018-02-06 10:14 ` [PATCH/RFC 6/6] Treewide: Remove depends on HAS_DMA in case of platform dependency Geert Uytterhoeven
2018-02-15 13:19 ` Felipe Balbi
2018-02-06 12:01 ` Mark Brown [this message]
2018-02-06 13:05 ` [PATCH/RFC 0/6] Allow compile-testing NO_DMA Robin Murphy
2018-02-06 15:24 ` Arnd Bergmann
2018-02-06 15:16 ` Arnd Bergmann
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