On Wed, 2021-01-06 at 18:52 +0100, Greg Kroah-Hartman wrote:
> On Wed, Jan 06, 2021 at 07:43:42PM +0200, Filip Kolev wrote:
> > On 06-Jan-21 09:51, Greg Kroah-Hartman wrote:
> > > On Tue, Jan 05, 2021 at 10:29:18PM +0200, Filip Kolev wrote:
> > > > There is a debug message using hardcoded function name instead of the
> > > > __func__ macro. Replace it.
> > > >
> > > > Report from checkpatch.pl on the file:
> > > >
> > > > WARNING: Prefer using '"%s...", __func__' to using 'ov2722_remove',
> > > > this function's name, in a string
> > > > + dev_dbg(&client->dev, "ov2722_remove...\n");
[]
> > > > diff --git a/drivers/staging/media/atomisp/i2c/atomisp-ov2722.c
> > > > b/drivers/staging/media/atomisp/i2c/atomisp-ov2722.c
[]
> > > > @@ -1175,7 +1175,7 @@ static int ov2722_remove(struct i2c_client
> > > > *client)
> > > > struct v4l2_subdev *sd = i2c_get_clientdata(client);
> > > > struct ov2722_device *dev = to_ov2722_sensor(sd);
> > > > - dev_dbg(&client->dev, "ov2722_remove...\n");
> > > > + dev_dbg(&client->dev, "%s...\n", __func__);
> > >
> > > dev_dbg() provides the function name already, and this is just a "trace"
> > > call, and ftrace should be used instead, so the whole line should be
> > > removed entirely.
> >
> > Thank you for the review!
> >
> > How do I go about this? Do I amend the patch and re-send as v2 or create a
> > new patch entirely?
>
> New patch entirely please.
There are quite a lot of these relatively useless function tracing like
uses in the kernel:
$ git grep -P '"%s[\.\!]*\\n"\s*,\s*__func__\s*\)' | wc -l
1065
Perhaps yet another checkpatch warning would be useful:
---
scripts/checkpatch.pl | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index e6857bdfcb2d..46b8ec8fe9e1 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -5981,6 +5981,14 @@ sub process {
"Prefer using '\"%s...\", __func__' to using
'$context_function', this function's name, in a string\n" . $herecurr);
}
+# check for unnecessary function tracing like uses
+ if ($rawline =~
/^\+\s*$logFunctions\s*\([^"]*"%s[\.\!]*\\n"\s*,\s*__func__\s*\)\s*;\s*$/) {
+ if (WARN("TRACING_LOGGING",
+ "Unnecessary ftrace-like logging - prefer
using ftrace\n" . $herecurr) &&
+ $fix) {
+ fix_delete_line($fixlinenr, $rawline);
+ }
+ }
# check for spaces before a quoted newline
if ($rawline =~ /^.*\".*\s\\n/) {
if (WARN("QUOTED_WHITESPACE_BEFORE_NEWLINE",
