linux-kernel - Re: [RFC v1] tree-wide: remove "select FW

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Date:	Sat, 23 May 2015 09:14:33 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	"Luis R. Rodriguez" <mcgrof@...e.com>
Cc:	Herbert Xu <herbert@...dor.apana.org.au>,
	Josh Triplett <josh@...htriplett.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Takashi Iwai <tiwai@...e.de>, Paul Bolle <pebolle@...cali.nl>,
	Borislav Petkov <bp@...en8.de>,
	Greg KH <gregkh@...uxfoundation.org>,
	"David S. Miller" <davem@...emloft.net>, clemens@...isch.de,
	JBottomley@...n.com, David Airlie <airlied@...ux.ie>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Marcel Holtmann <marcel@...tmann.org>,
	"Gustavo F. Padovan" <gustavo@...ovan.org>,
	Johan Hedberg <johan.hedberg@...il.com>,
	Mikael Starvik <starvik@...s.com>,
	Jesper Nilsson <jesper.nilsson@...s.com>,
	Imre Kaloz <kaloz@...nwrt.org>, khalasa@...p.pl,
	Ohad Ben-Cohen <ohad@...ery.com>,
	Arnd Bergmann <arnd@...db.de>, 3chas3@...il.com,
	Jiri Slaby <jslaby@...e.cz>, Bryan Wu <cooloney@...il.com>,
	Richard Purdie <rpurdie@...ys.net>,
	Jacek Anaszewski <j.anaszewski@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC v1] tree-wide: remove "select FW_LOADER" uses

On Sat, May 23, 2015 at 1:02 AM, Luis R. Rodriguez <mcgrof@...e.com> wrote:
> On Fri, May 22, 2015 at 3:33 PM, Herbert Xu <herbert@...dor.apana.org.au> wrote:
>> On Sat, May 23, 2015 at 12:22:00AM +0200, Luis R. Rodriguez wrote:
>>> Kind of, the issue actually was a new component which depends on FW_LOADER
>>> and has crypto dependencies. Since the qat crypto driver selects FW_LOADER
>>> but also has a set of crypto dependencies that creates a recursive dependency
>>> loop.
>>
>> Actually, how about making FW_SIG select FW_LOADER instead of
>> depending on it? I think this should break the cycle.
>
> Indeed, it does. Kind of odd, but works - and well if others run into
> the recursive issue then we have two diverging solutions now:
>
>   a) Either swap all "select FOO" to "depends on FOO" or,
>   b) Change the offending "depends on FOO" to "select FOO"
>
> So sticking to one seems to make Kconfig happy for recursive
> dependency solving for now...

Yes, that works, too.

Perhaps Kconfig should start warning if it encounters a symbol
that is both selected and being depended on, even without detecting an
explicit recursive dependency?
That's gonna give tons of warnings, though...

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
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