Re: [PATCH 3/6] keucr: migrate printk to dev_dbg/info/warn/err
From: Joe Perches
Date: Thu Jun 06 2013 - 17:23:15 EST
On Fri, 2013-06-07 at 00:11 +0300, Dan Carpenter wrote:
> On Thu, Jun 06, 2013 at 10:53:20AM -0700, Joe Perches wrote:
> > On Thu, 2013-06-06 at 18:10 +0200, Johannes Schilling wrote:
> > > From: Laura Lawniczak <laura.lawniczak@xxxxxxxxxxxxxx>
> > 
> > > diff --git a/drivers/staging/keucr/init.c b/drivers/staging/keucr/init.c
> > 
> > > @@ -19,13 +19,13 @@ int ENE_InitMedia(struct us_data *us)
> > 
> > > - printk(KERN_INFO "MiscReg03 = %x\n", MiscReg03);
> > > + dev_info(&us->pusb_dev->dev, "MiscReg03 = %x\n", MiscReg03);
> > I suggest adding a few convenience macros to make
> > this a bit shorter and more likely to fit on a single
> > line without exceeding 80 cols.
> > Adding something like:
> > #define us_<level>(us, fmt, ...) \
> > dev_<level>(&us->pusb_dev->dev, fmt, ##__VA_ARGS__)
> > so these uses become
> > us_info(us, "MiscReg03\n", MiscReg03);
> > which is shorter and more readable.
> Wait what? That's not a readable example. Why are we passing the
> MiscReg03 variable when there is no %d in the string?
'cause I forgot to add in the " = %x", Oops.
> You're a big fan of custom printk macros but it's better if people
> can stick the to the normal ones if possible. In this case, just
> using a local variable is enough:
> dev_dbg(us_dev, "scsi cmd %X --- SCSIOP_ALLOW_MEDIUM_REMOVAL\n", cmd);
> 79 characters.
<shrug> Now you need another line to set the local var
in each function. If there's only a few functions that'd
> Anyway this could fixed in a later patch.
True, but if there are a lot of files patched separately,
putting the macro in an appropriate header first saves a
lot of follow up patches.
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