On 11/03/2014 03:04 PM, Mauro Carvalho Chehab wrote:
Em Sun, 12 Oct 2014 13:03:09 +0300
Olli Salonen <olli.salo...@iki.fi> escreveu:
Added debug logging using dev_dgb.
@@ -396,6 +415,8 @@ static void dvbsky_exit(struct dvb_usb_device *d)
struct dvbsky_state *state = d_to_priv(d);
struct i2c_client *client;
+ dev_dbg(&d->udev->dev, "\n");
+
No need to add new debug macros that only prints the called functions,
as you could get it too with Kernel tracing.
ftrace [1] is a bit heavy tool for module debugs like that. There is
many different debugs for different use cases. When you add debugs to
module those are usually used just to see how your module works and
functions are called. Same is for V4L core debugs too; enable those and
you will get tons of unneeded/useless information which makes totally
hard to develop driver in question. When you add debugs to driver
module, those are generally useful for cases where you want develop that
certain driver module and not see zillion lines of unrelated debug data.
Also, I think that kind of debug log will not generate any binary code
when debug options are not enabled by Kconfig, so it is not even reason
for optimization.
[1] https://www.kernel.org/doc/Documentation/trace/ftrace.txt
regards
Antti
--
http://palosaari.fi/
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