linux-kernel - Re: [PATCH v2 20/21] mk68/mac: Switch to use %ptR

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Date:   Wed, 21 Feb 2018 10:38:25 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Rasmus Villemoes <rasmus.villemoes@...vas.dk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        linux-rtc@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Joe Perches <joe@...ches.com>,
        Mark Salyzyn <salyzyn@...roid.com>
Subject: Re: [PATCH v2 20/21] mk68/mac: Switch to use %ptR

Hi Andy,

On Tue, Feb 20, 2018 at 10:43 PM, Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
> Use %ptR instead of open coded variant to print content of
> struct rtc_time in human readable format.
>
> Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  arch/m68k/Kconfig.machine | 1 +
>  arch/m68k/mac/misc.c      | 8 ++------
>  2 files changed, 3 insertions(+), 6 deletions(-)
>
> diff --git a/arch/m68k/Kconfig.machine b/arch/m68k/Kconfig.machine
> index 64a641467736..620a55da648e 100644
> --- a/arch/m68k/Kconfig.machine
> +++ b/arch/m68k/Kconfig.machine
> @@ -26,6 +26,7 @@ config MAC
>         bool "Macintosh support"
>         depends on MMU
>         select MMU_MOTOROLA if MMU
> +       select PRINTK_PEXT_TIMEDATE

Yeah, now you have to track whatever code uses the new %p extension...

Note that the user below uses pr_debug(), so technically it depends on
DYNAMIC_DEBUG, or (more likely) someone manually inserting "#define DEBUG"
at the top of the file for a short debug session ;-)

> --- a/arch/m68k/mac/misc.c
> +++ b/arch/m68k/mac/misc.c
> @@ -673,13 +673,9 @@ int mac_hwclk(int op, struct rtc_time *t)
>                 unmktime(now, 0,
>                          &t->tm_year, &t->tm_mon, &t->tm_mday,
>                          &t->tm_hour, &t->tm_min, &t->tm_sec);
> -               pr_debug("%s: read %04d-%02d-%-2d %02d:%02d:%02d\n",
> -                        __func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
> -                        t->tm_hour, t->tm_min, t->tm_sec);
> +               pr_debug("%s: read %ptR\n", __func__, t);
>         } else { /* write */
> -               pr_debug("%s: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
> -                        __func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
> -                        t->tm_hour, t->tm_min, t->tm_sec);
> +               pr_debug("%s: tried to write %ptR\n", __func__, t);
>
>                 now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
>                              t->tm_hour, t->tm_min, t->tm_sec);

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds