tree 3a7cfbea0c456f44b79db2985d8e6e7085fa4152
parent 2c2742da1e590f426e8d85ce4e33b69142245fb8
author Arnd Bergmann <arnd@arndb.de> 1288182632 -0300
committer Mauro Carvalho Chehab <mchehab@redhat.com> 1289262957 -0200

[media] v4l: kill the BKL

All of the hard problems for BKL removal appear to be solved in the
v4l-dvb/master tree. This removes the BKL from the various open
functions that do not need it, or only use it to protect an
open count.

The zoran driver is nontrivial in this regard, so I introduce
a new mutex that locks both the open/release and the ioctl
functions. Someone with access to the hardware can probably
improve that by using the existing lock in all cases.

Finally, all drivers that still use the locked version of the
ioctl function now get called under a new mutex instead of
the BKL.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>