From b04bce476c57ac844962462ee4c813c44fa942cf Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Fri, 22 Aug 2008 21:03:11 -0300 Subject: V4L/DVB (8772): cx18: Convert cx18_queue buffers member to atomic_t cx18: Convert cx18_queue buffers member to atomic_t. This allows safe concurrent access to check if a queue has data without having to acquire the queue spinlock. Signed-off-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx18/cx18-ioctl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/media/video/cx18/cx18-ioctl.c') diff --git a/drivers/media/video/cx18/cx18-ioctl.c b/drivers/media/video/cx18/cx18-ioctl.c index a7f8396..5325c7a 100644 --- a/drivers/media/video/cx18/cx18-ioctl.c +++ b/drivers/media/video/cx18/cx18-ioctl.c @@ -731,7 +731,8 @@ static int cx18_log_status(struct file *file, void *fh) continue; CX18_INFO("Stream %s: status 0x%04lx, %d%% of %d KiB (%d buffers) in use\n", s->name, s->s_flags, - (s->buffers - s->q_free.buffers) * 100 / s->buffers, + (s->buffers - atomic_read(&s->q_free.buffers)) + * 100 / s->buffers, (s->buffers * s->buf_size) / 1024, s->buffers); } CX18_INFO("Read MPEG/VBI: %lld/%lld bytes\n", -- cgit v1.1