linux-kernel - Re: [RFC] asm-generic/pci_iomap.h: make custom PCI BAR requirements explicit

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Message-ID: <CAB=NE6UiqjP18pUgGVXJiBjTi+=3Q8kVmwTC=p2NKu-c0A6t3w@mail.gmail.com>
Date:	Tue, 8 Sep 2015 02:54:47 -0700
From:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>,
	linux-arch@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	schwidefsky@...ibm.com, heiko.carstens@...ibm.com,
	linux-s390@...r.kernel.org, Borislav Petkov <bp@...e.de>,
	Guenter Roeck <linux@...ck-us.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [RFC] asm-generic/pci_iomap.h: make custom PCI BAR requirements explicit

On Wed, Sep 2, 2015 at 6:47 PM, Luis R. Rodriguez
<mcgrof@...not-panic.com> wrote:
> On Wed, Sep 2, 2015 at 6:44 PM, Luis R. Rodriguez <mcgrof@...e.com> wrote:
>>> I don't think we really need to spell it out here. s390 PCI is different
>>> from everybody else's in a lot of ways, so a simple 'depends on PCI &&
>>> !S390' for CONFIG_PCI_IOMAP seems simpler and more intuitive.
>>
>> Sure that would work as well.
>
> But on second thought it still would leave us reactive to S390, this
> solution would get folks extending this asm-generic stuff to also have
> something in place for S390, even if its just returning NULL.

Arnd, thoughts?

 Luis
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