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SubjectRe: [PATCH 1/3] m68knommu: fix undefined reference to `mach_get_rtc_pll'
Hi Greg,

On Wed, May 18, 2022 at 8:56 AM Greg Ungerer <gerg@linux-m68k.org> wrote:
> Configuring for a nommu classic m68k target and enabling the generic rtc
> driver (CONFIG_RTC_DRV_GENERIC) will result in the following compile
> error:
>
> m68k-linux-ld: arch/m68k/kernel/time.o: in function `rtc_ioctl':
> time.c:(.text+0x82): undefined reference to `mach_get_rtc_pll'
> m68k-linux-ld: time.c:(.text+0xbc): undefined reference to `mach_set_rtc_pll'
> m68k-linux-ld: time.c:(.text+0xf4): undefined reference to `mach_set_rtc_pll'
>
> There is no definitions of "mach_set_rtc_pll" and "mach_get_rtc_pll" in the
> nommu code paths. Move these definitions and the associated "mach_hwclk",
> so that they are around their use case in time.c. This means they will
> always be defined on the builds that require them, and not on those that
> cannot use them - such as ColdFire (both with and without MMU enabled).
>
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>

> --- a/arch/m68k/kernel/time.c
> +++ b/arch/m68k/kernel/time.c
> @@ -82,6 +86,11 @@ void read_persistent_clock64(struct timespec64 *ts)
> #endif
>
> #if IS_ENABLED(CONFIG_RTC_DRV_GENERIC)
> +int (*mach_get_rtc_pll)(struct rtc_pll_info *);
> +int (*mach_set_rtc_pll)(struct rtc_pll_info *);
> +EXPORT_SYMBOL(mach_get_rtc_pll);
> +EXPORT_SYMBOL(mach_set_rtc_pll);

Oops, this causes build failures for Q40 with CONFIG_RTC_DRV_GENERIC=n,
as arch/m68k/q40/config.c uses mach_]gs]et_rtc_pll() unconditionally.

> +
> static int rtc_generic_get_time(struct device *dev, struct rtc_time *tm)
> {
> mach_hwclk(0, tm);

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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

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