A freezable kernel thread can enter frozen state during freezing by
either calling try_to_freeze() or using wait_event_freezable() and its
variants. So for the following snippet of code in a kernel thread loop:
try_to_freeze();
wait_event_interruptible();
We can change it to a simple wait_event_freezable() and then eliminate
a function call.
Signed-off-by: Kevin Hao <haokexin@xxxxxxxxx>
---
drivers/media/usb/pvrusb2/pvrusb2-dvb.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/drivers/media/usb/pvrusb2/pvrusb2-dvb.c b/drivers/media/usb/pvrusb2/pvrusb2-dvb.c
index 26811efe0fb5..6dd6c5a18251 100644
--- a/drivers/media/usb/pvrusb2/pvrusb2-dvb.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-dvb.c
@@ -33,9 +33,6 @@ static int pvr2_dvb_feed_func(struct pvr2_dvb_adapter *adap)
for (;;) {
if (kthread_should_stop()) break;
- /* Not sure about this... */
- try_to_freeze();
-
bp = pvr2_stream_get_ready_buffer(stream);
if (bp != NULL) {
count = pvr2_buffer_get_count(bp);
@@ -62,8 +59,7 @@ static int pvr2_dvb_feed_func(struct pvr2_dvb_adapter *adap)
/* Wait until more buffers become available or we're
told not to wait any longer. */
- ret = wait_event_interruptible(
- adap->buffer_wait_data,
+ ret = wait_event_freezable(adap->buffer_wait_data,
(pvr2_stream_get_ready_count(stream) > 0) ||
kthread_should_stop());
if (ret < 0) break;
--
2.39.2
