indicating an unhandled "command". ERESTART is -1, which can lead to
confusion. ERESTART has been moved to -3 and EPASSTHROUGH has been
placed at -4. No ioctl code should now return -1 anywhere. The
ioctl() system call is now properly restartable.
little endian like order, however, usage of 'HPCFB_SWAP_*' was widely
misunderstood because it reminded you of 'RI_BSWAP' in raster operation.
Please note that 'RI_BSWAP' indicate that frame buffer byte order is different
from natural order of system while 'HPCFB_REVORDER_*' is independent of
system byte order.
