Hi,
On Mon, Mar 22, 2021 at 11:19 AM Arnd Bergmann <a...@kernel.org> wrote:
>
> On Mon, Mar 22, 2021 at 6:07 PM Doug Anderson <diand...@chromium.org> wrote:
> > On Mon, Mar 22, 2021 at 9:43 AM Arnd Bergmann <a...@kernel.org> wrote:
> > >
> > > -#define v1printk(a...) do { \
> > > - if (verbose) \
> > > - printk(KERN_INFO a); \
> > > - } while (0)
> > > -#define v2printk(a...) do { \
> > > - if (verbose > 1) \
> > > - printk(KERN_INFO a); \
> > > - touch_nmi_watchdog(); \
> > > - } while (0)
> > > -#define eprintk(a...) do { \
> > > - printk(KERN_ERR a); \
> > > - WARN_ON(1); \
> > > - } while (0)
> > > +#define v1printk(a...) do { \
> >
> > nit: In addition to the indentation change you're also lining up the
> > backslashes. Is that just personal preference, or is there some
> > official recommendation in the kernel? I don't really have a strong
> > opinion either way (IMO each style has its advantages).
>
> I don't think there is an official recommendation, I just think the
> style is more common, and it helped my figure out what the
> indentation should look like in this case.
OK, makes sense. I just wasn't sure if there was some standard that I
wasn't aware of. Given that you have to touch all these lines anyway
then making them all pretty like this seems fine to me.
> > > + if (verbose) \
> > > + printk(KERN_INFO a); \
> > > +} while (0)
> > > +#define v2printk(a...) do { \
> > > + if (verbose > 1) \
> > > + printk(KERN_INFO a); \
> > > + touch_nmi_watchdog(); \
> >
> > This touch_nmi_watchdog() is pretty wonky. I guess maybe the
> > assumption is that the "verbose level 2" prints are so chatty that the
> > printing might prevent us from touching the NMI watchdog in the way
> > that we normally do and thus we need an extra one here?
> >
> > ...but, in that case, I think the old code was _wrong_ and that the
> > intention was that the touch_nmi_watchdog() should only be if "verose
> > > 1" as the indentation implied. There doesn't feel like a reason to
> > touch the watchdog if we're not doing anything slow.
>
> No idea. It was like this in Jason's original version from 2008.
Yeah, I noticed the same. I'd be curious what Daneil (or Jason if he's
reading) says. I suppose i could always wait until your patch lands
and then send a new patch that puts it inside the "if" statement and
we can debate it then.
-Doug
