On Wed, 24 Oct 2007 18:20:52 -0700
David Brownell <david-b@pacbell.net> wrote:

quoted text
> Add a new resource_len() function, so drivers can start using this
> instead of driver-private code for a common idiom.  The call can be
> useful with at least:
> 
>  - request_region(), release_region()
>  - request_mem_region(), release_mem_region()
>  - ioremap()
> 
> Candidate drivers include those using platform or PNP busses, and
> maybe some others.  PCI already has a similar function.
> 
> This patch also updates a representative set of drivers in two
> subsystems to use this call (SPI, and USB peripheral/gadget).

PCI also increasingly is using functions that allow the user to choose to
map a resource as a resource (eg pci_iomap). So is it better to have
functions request_mem_resource(res)  free_mem_resource(res) and similar
instead or as well ?


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