tree 0bd1889eb3cbabe51f15cc5e971f9644cdced0f3
parent ddcd9fb66ae7f448b517242c10a31d4e17bcad45
author Arnd Bergmann <arnd@arndb.de> 1281123630 +0200
committer Greg Kroah-Hartman <gregkh@suse.de> 1281473264 -0700

tty: implement BTM as mutex instead of BKL

The tty locking now follows the rules for mutexes, so
we can replace the BKL usage with a new subsystem
wide mutex.

Using a regular mutex here will change the behaviour
when blocked on the BTM from spinning to sleeping,
but that should not be visible to the user.

Using the mutex also means that all the BTM is now
covered by lockdep.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>