SCO buffer addressing

[Boyd Roberts]

Perhaps it's a more general System V problem as the high bit
of `b_dev' may be set depending on the file-system type.  There's
some hideous macro `bmajor()' that will mash off that bit.  Use
it instead of major().

The bit is required to determine the block size of the I/O blah blah
inside the driver.  The whole thing is a steaming crock of merde...


Boyd Roberts			boyd at prl.dec.com

``When the going gets wierd, the weird turn pro...''