* new helpers - READ_BYTE() and WRITE_BYTE().  On Linux they are
   needed, since direct access to iomem pointers is not allowed (and
   does not work on some architectures).
 * memcpy() to/from iomem is not allowed on Linux (same story).

Proper primitives are memcpy_toio() and memcpy_fromio().  Several places
misused memcpy(); switched to memcpy_{to,from}io().
Signed-off-by: Armin Schindler <armin@melware.de>
Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>