K 10
svn:author
V 2
ed
K 8
svn:date
V 27
2008-06-03T12:38:00.094947Z
K 7
svn:log
V 596
Remove unneeded Giant locking of /dev/tty.

The Giant lock is acquired in two places in tty_tty.c. In both places,
it is unneeded.

There is no reason to specify D_NEEDGIANT on this device node. The
device node has only been designed to return ENXIO when opened. It
doesn't make any sense to lock/unlock Giant, just to return this error.
D_TTY is also unneeded. The unimplemented functions don't need to be
patched by devfs.

We don't need to lock Giant when we want to lookup the proper TTY vnode.
s_ttyvp is already protected by proctree_lock (see devfs_vnops.c).

Approved by:	philip (mentor)

END