git: kernel - Add a workaround for tty_token during low-level bo
commit ec2a14f513658cac0bfdd4a0345ee7712b7b43a1
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Mon Aug 30 22:31:49 2010 -0700
kernel - Add a workaround for tty_token during low-level boot
* The low level cninit() code dives into dev/video and does a ton
of tty_token acquisitions and releases, and even after the bug
fixes there is still something weird going on in there.
This is a workaround to wrap a master tty_token around the
cninit() code which prevents an early-boot crash if
lwkt_gettoken()'s td_mpcount optimization is turned off.
(the optimization masks the problem).
* Also assert that the mpcount remains correct after the mess
is done initializing, if it is wrong the SMP/AP boot will
blow up on us.
Summary of changes:
sys/kern/tty_cons.c | 21 +++++++++++++++++++--
1 files changed, 19 insertions(+), 2 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/ec2a14f513658cac0bfdd4a0345ee7712b7b43a1
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