On 07/22/2014 06:32 PM, Arnd Bergmann wrote:

On Sunday 20 July 2014 17:45:40 Chen Gang wrote:

quoted

quoted

Next, I shall:

 - Remove HAS_IOMEM and NO_IOMEM from kernel, firstly.

 - Try to make dummy IOMEM functions for score architecture.

 - Continue discussing with UML for it.

 
Oh, sorry, I forgot, after remove IOMEM from kernel, also s390 and tile
need implement dummy IOMEM if !PCI.

If possible, I shall try to implement the dummy IOMEM in 'asm-generic',
and let uml, score, s390 and tile use them when they need.

Sorry for going round in circles, but looking back at the original patches,
adding the extra 'depends on HAS_IOMEM' does seem much better than the
other suggestions that came afterwards.

In particular, removing HAS_IOMEM and NO_IOMEM sounds like an awful idea
to me. I'd rather add a HAS_IOPORT in addition to also catch architectures
that have no support for PC-style PIO.

Welcome any other members (especially driver members) ideas and
suggestions -- driver members and architecture members have different
tastes and different roles.

For me, if no additional reply, I prefer to keep current status, and
still add 'depends on HAS_IOMEM' for each driver which need it, but I am
not sure whether driver members can bear it.


Thanks.
-- 
Chen Gang

Open, share, and attitude like air, water, and life which God blessed