linux-kernel - Re: [PATCH v2] spi/drivers: Restrict COMPILE_TEST by HAS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAMuHMdW3RBxXNrfK=2d_uHCesE+NaLFheGgdBEP7JuPcd8Xd1Q@mail.gmail.com>
Date:	Fri, 29 Aug 2014 21:13:24 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Mark Brown <broonie@...nel.org>
Cc:	linux-spi <linux-spi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] spi/drivers: Restrict COMPILE_TEST by HAS_DMA where needed

Hi Mark,

On Fri, Aug 29, 2014 at 7:37 PM, Mark Brown <broonie@...nel.org> wrote:
> On Fri, Aug 29, 2014 at 06:10:31PM +0200, Geert Uytterhoeven wrote:
>> commit dd1053a93fdc11d4 ("spi/drivers: Enable build of drivers with
>> COMPILE_TEST") allows compile-testing drivers on platforms they're not
>> meant for.
>
>> However, adding "|| COMPILE_TEST" bypasses all other implicit dependencies
>> assumed by the platform dependencies before, like HAS_DMA.
>
> I'm wondering if it isn't better to have the non-DMA platforms define
> stub (always error) DMA functions instead - it's less error prone and
> with SPI there's a bunch of drivers which can run perfectly usefully
> without DMA while optionally supporting DMA.

The SPI problem will sort itself out once all SPI master drivers have been
converted to use the SPI DMA core ;-)

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/