[PATCH 08/10] arch: introduce strict_ioremap

Dan Williams dan.j.williams at intel.com
Tue Jul 21 09:11:29 PDT 2015

On Tue, Jul 21, 2015 at 6:30 AM, Christoph Hellwig <hch at lst.de> wrote:
> On Sun, Jul 19, 2015 at 08:18:17PM -0400, Dan Williams wrote:
>> In preparation for enabling memremap(), add support for strict mappings.
>> strict_ioremap_<type>() returns NULL if the arch does not implement the
>> mapping type, rather than falling back silently to ioremap().
> Please don't introduce another large number of ioremap variants.
> I think we should go straight to the ioremap_flags variant, although
> I wonder if we should even bother with ioremap_flags for this use
> case, given that we really want memremap-like semantics for anything
> that isn't plain ioremap (and maybe ioremap_nocache).
> Sorry or being the downer, but I really think we need to clean up this
> mess deeply insted of trying to paper over it.

No worries.  I'll rework the series around the idea that memremap() is
a replacement rather than a wrapper for ioremap_<type>().

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