diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2010-09-11 19:56:45 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2010-10-19 11:29:56 +0200 |
| commit | 72024f1ec5164a70d84dd8cf4458fe4064a6b692 (patch) | |
| tree | fb0848c2bb91af16f46e2fca8de55675f9b1e3d2 /drivers/media/dvb/dvb-core/dmxdev.c | |
| parent | adfedd216d9f0bc3f5bfa8aab42932301d4edc31 (diff) | |
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 <arnd@arndb.de>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: linux-media@vger.kernel.org
Diffstat (limited to 'drivers/media/dvb/dvb-core/dmxdev.c')
| -rw-r--r-- | drivers/media/dvb/dvb-core/dmxdev.c | 17 |
1 files changed, 2 insertions, 15 deletions
diff --git a/drivers/media/dvb/dvb-core/dmxdev.c b/drivers/media/dvb/dvb-core/dmxdev.c index 0042306ea11..2de13b04b09 100644 --- a/drivers/media/dvb/dvb-core/dmxdev.c +++ b/drivers/media/dvb/dvb-core/dmxdev.c @@ -25,7 +25,6 @@ #include <linux/slab.h> #include <linux/vmalloc.h> #include <linux/module.h> -#include <linux/smp_lock.h> #include <linux/poll.h> #include <linux/ioctl.h> #include <linux/wait.h> @@ -1088,13 +1087,7 @@ static int dvb_demux_do_ioctl(struct file *file, static long dvb_demux_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { - int ret; - - lock_kernel(); - ret = dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl); - unlock_kernel(); - - return ret; + return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl); } static unsigned int dvb_demux_poll(struct file *file, poll_table *wait) @@ -1186,13 +1179,7 @@ static int dvb_dvr_do_ioctl(struct file *file, static long dvb_dvr_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { - int ret; - - lock_kernel(); - ret = dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl); - unlock_kernel(); - - return ret; + return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl); } static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait) |