Hi Alan,
 I'm getting the following lockdep warning when I log on the system

and setfont is called.
 Seems tty related. The kernel is a 2.6.26-rc4-git4 vanilla.
"""

=======================================================

[ INFO: possible circular locking dependency detected ]

2.6.26-0.rc4.git4.1mdv #1

-------------------------------------------------------

setfont/3775 is trying to acquire lock:

 (tasklist_lock){..--}, at: [<c0127315>] kill_pgrp+0x16/0x39
but task is already holding lock:

 (&tty->ctrl_lock){....}, at: [<c0232d4b>] vc_resize+0x356/0x3ee
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&tty->ctrl_lock){....}:

       [<c0139485>] __lock_acquire+0xa27/0xb97

       [<c0139654>] lock_acquire+0x5f/0x84

       [<c02c7580>] _spin_lock_irqsave+0x35/0x45

       [<c0222a5e>] __proc_set_tty+0x1e/0xa4

       [<c0225cde>] tty_ioctl+0x5e3/0xe85

       [<c017b771>] vfs_ioctl+0x19/0x49

       [<c017b999>] do_vfs_ioctl+0x1f8/0x20f

       [<c017b9f0>] sys_ioctl+0x40/0x5c

       [<c010392f>] sysenter_past_esp+0x78/0xd9

       [<ffffffff>] 0xffffffff
-> #1 (&sighand->siglock){.+..}:

       [<c0139485>] __lock_acquire+0xa27/0xb97

       [<c0139654>] lock_acquire+0x5f/0x84

       [<c02c74d8>] _spin_lock+0x19/0x28

       [<c011cdfb>] copy_process+0xc13/0xf78

       [<c011d20d>] do_fork+0xad/0x1dc

       [<c01024ea>] kernel_thread+0x79/0x81

       [<c012d7f7>] kthreadd+0x95/0x11f

       [<c0104c47>] kernel_thread_helper+0x7/0x10

       [<ffffffff>] 0xffffffff
-> #0 (tasklist_lock){..--}:

       [<c01393a4>] __lock_acquire+0x946/0xb97

       [<c0139654>] lock_acquire+0x5f/0x84

       [<c02c7723>] _read_lock+0x19/0x28

       [<c0127315>] kill_pgrp+0x16/0x39

       [<c0232d88>] vc_resize+0x393/0x3ee

       [<c01f1786>]...
[ message continues ]