From 72024f1ec5164a70d84dd8cf4458fe4064a6b692 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Sat, 11 Sep 2010 19:56:45 +0200 Subject: dvb-core: kill the big kernel lock The dvb core only uses the big kernel lock in the open and ioctl functions, which means it can be replaced with a dvb specific mutex. Fortunately, all the ioctl functions go through dvb_usercopy, so we can move the serialization in there. Signed-off-by: Arnd Bergmann Cc: Mauro Carvalho Chehab Cc: linux-media@vger.kernel.org --- drivers/media/dvb/dvb-core/dvb_ca_en50221.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) (limited to 'drivers/media/dvb/dvb-core/dvb_ca_en50221.c') diff --git a/drivers/media/dvb/dvb-core/dvb_ca_en50221.c b/drivers/media/dvb/dvb-core/dvb_ca_en50221.c index cb97e6b85432..1723a984a522 100644 --- a/drivers/media/dvb/dvb-core/dvb_ca_en50221.c +++ b/drivers/media/dvb/dvb-core/dvb_ca_en50221.c @@ -1259,13 +1259,7 @@ static int dvb_ca_en50221_io_do_ioctl(struct file *file, static long dvb_ca_en50221_io_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { - int ret; - - lock_kernel(); - ret = dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl); - unlock_kernel(); - - return ret; + return dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl); } -- cgit v1.2.3-55-g7522