linux-kernel - Re: [PATCH 01/22] m68k/atari: Modernize printing of kernel messages

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Date:   Fri, 9 Dec 2016 09:55:58 +1100 (AEDT)
From:   Finn Thain <fthain@...egraphics.com.au>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
cc:     Greg Ungerer <gerg@...ux-m68k.org>, Sam Creasey <sammy@...my.net>,
        Joshua Thompson <funaho@...ai.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 01/22] m68k/atari: Modernize printing of kernel
 messages


On Thu, 8 Dec 2016, Geert Uytterhoeven wrote:

> On Wed, Dec 7, 2016 at 11:36 PM, Finn Thain <fthain@...egraphics.com.au> wrote:
> > On Wed, 7 Dec 2016, Geert Uytterhoeven wrote:
> >>   - Convert from printk() to pr_*(),
> >>   - Add missing continuations, to fix user-visible breakage,
> >>   - Drop useless WARNING prefix,
> >>   - Move trailing spaces to start of continuations.
> >>
> >> Fixes: 4bcc595ccd80decb ("printk: reinstate KERN_CONT for printing continuation lines")
> >> Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> >> ---
> >>  arch/m68k/atari/atakeyb.c | 14 ++++++------
> >>  arch/m68k/atari/config.c  | 56 +++++++++++++++++++++++------------------------
> >>  2 files changed, 35 insertions(+), 35 deletions(-)
> >>
> >> diff --git a/arch/m68k/atari/atakeyb.c b/arch/m68k/atari/atakeyb.c
> >> index 264db11268039329..37091898adb3d3b5 100644
> >> --- a/arch/m68k/atari/atakeyb.c
> >> +++ b/arch/m68k/atari/atakeyb.c
> >> @@ -149,7 +149,7 @@ static irqreturn_t atari_keyboard_interrupt(int irq, void *dummy)
> >>       if (acia_stat & ACIA_OVRN) {
> >>               /* a very fast typist or a slow system, give a warning */
> >>               /* ...happens often if interrupts were disabled for too long */
> >> -             printk(KERN_DEBUG "Keyboard overrun\n");
> >> +             pr_debug("Keyboard overrun\n");
> >>               scancode = acia.key_data;
> >>               if (ikbd_self_test)
> >>                       /* During self test, don't do resyncing, just process the code */
> >
> > This is not equivalent (unless there is a DEBUG macro definition hinding
> > in a header file somewhere). Since the changelog doesn't mention
> > suppressing any output, perhaps you were deceived by the questionable API,
> > as I have been in the past (see 16b9d870a0 and d61c5427f6).
> 
> This is an actual message people want to see in the kernel log, even
> when not debugging?
> 

That's really a question for Atari users, of course. For my part, I think 
you should mention the behavioural change in the commit log.

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