There are two locking sets involved. One locks the board mappings and the
other is the tty open/close locking. The low level code was clearly
designed to be ported to OS's with spin locks already so pretty much comes
out in the wash
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
b65b5b59f9