Re: readsw/writesw readsl/writesl

["David S. Miller" <davem@redhat.com>]

   From: Andre Hedrick <andre@linux-ide.org>
   Date: Mon, 26 Aug 2002 23:23:22 -0700 (PDT)
   
   Would you consider these for each arch as there are coresponding one for
   IOMIO, and life would be better if we had a standard set for MMIO.
   
   Please consider the request.

I responded to the private email I got on this subject.
I forget who asked me this, but they said they were working
on this IDE stuff.

My response was that io_barrier() shall be defined on all
platforms in asm/io.h and that you can then define your
ide_read{l,w,b} as:

	__raw_raw{l,w,b}(...);
	io_barrier();

So instead of having a million read* variations, we have one that is
standard usage (little endian + I/O barrier) and then a raw variant
where the cpu does nothing special and you have to byte-twiddle and
barrier explicitly.