From: Arnd Bergmann <arnd@arndb.de>
To: Rob Herring <robh@kernel.org>
Cc: Richard Weinberger <richard@nod.at>,
Lee Jones <lee.jones@linaro.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
user-mode-linux-devel@lists.sourceforge.net
Subject: Re: [PATCH 1/2] asm-generic/io.h: provide default ioremap/iounmap for !HAS_IOMEM
Date: Wed, 30 Mar 2016 15:51:19 +0200 [thread overview]
Message-ID: <5372571.zc5TeOVXyF@wuerfel> (raw)
In-Reply-To: <CAL_Jsq+RHwzxfoEFsD_-uAZ7Y_CEdXvv8qamdXtcToeG-ENy7w@mail.gmail.com>
On Wednesday 30 March 2016 08:29:45 Rob Herring wrote:
> On Wed, Mar 30, 2016 at 5:03 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> > On Wednesday 30 March 2016 10:13:53 Richard Weinberger wrote:
> >>
> >> I fully understand your point of view. COMPILE_TEST is a monster that
> >> can do the heavy lifting for you, but monsters also have claws and fangs.
> >>
> >> Having COMPILE_TEST having depend on !UML works for me. But don't
> >> we have other archs without io mem? At least a few years ago while
> >> porting nandsim to UML I found s390 that lacks of io mem too.
> >
> > s390 gained IOMEM support when they started having PCI attachments.
>
> I'm confused how s390 defines HAS_IOMEM and includes it from lib/Kconfig though.
Kconfig can define the same symbol multiple times, which is really
confusing. I only checked for NO_IOMEM, which s390 no longer defines,
but I have not checked what actually happens in case of two conflicting
definitions, where the one lib/Kconfig defaults to 'y' and the one in
arch/s390 defaults to CONFIG_PCI.
Arnd
next prev parent reply other threads:[~2016-03-30 13:51 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-29 18:23 [PATCH 1/2] asm-generic/io.h: provide default ioremap/iounmap for !HAS_IOMEM Rob Herring
2016-03-29 18:23 ` [PATCH 2/2] mfd: remove dependency on HAS_IOMEM Rob Herring
2016-03-30 4:23 ` Krzysztof Kozlowski
2016-03-29 19:37 ` [PATCH 1/2] asm-generic/io.h: provide default ioremap/iounmap for !HAS_IOMEM Arnd Bergmann
2016-03-29 19:50 ` Richard Weinberger
2016-03-29 20:13 ` Rob Herring
2016-03-30 7:50 ` Richard Weinberger
2016-03-30 8:04 ` Arnd Bergmann
2016-03-30 8:04 ` [uml-devel] " Arnd Bergmann
2016-03-30 8:13 ` Richard Weinberger
2016-03-30 8:13 ` Richard Weinberger
2016-03-30 10:03 ` Arnd Bergmann
2016-03-30 13:29 ` Rob Herring
2016-03-30 13:51 ` Arnd Bergmann [this message]
2016-03-30 20:08 ` Geert Uytterhoeven
2016-03-30 20:35 ` Richard Weinberger
2016-03-30 20:38 ` Arnd Bergmann
2016-03-30 21:20 ` Rob Herring
2016-03-31 8:39 ` Geert Uytterhoeven
2016-03-30 4:19 ` Krzysztof Kozlowski
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5372571.zc5TeOVXyF@wuerfel \
--to=arnd@arndb.de \
--cc=lee.jones@linaro.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=richard@nod.at \
--cc=robh@kernel.org \
--cc=user-mode-linux-devel@lists.sourceforge.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.