Re: rfc: remove early_printk from a few arches? (blackfin, m68k, mips)

Geert Uytterhoeven
2014-12-19T08:03:16Z

On Wed, Dec 17, 2014 at 9:58 PM, Joe Perches <joe@perches.com> wrote:
> It seems like early_printk can be configured into
> a few architectures but also appear not to be used.
>
> $ git grep -w "early_printk"

[...]

> arch/m68k/kernel/Makefile:obj-$(CONFIG_EARLY_PRINTK) += early_printk.o

[...]

> These seem to the only uses:
>
> arch/arm/mach-socfpga/socfpga.c: early_printk("Early printk initialized\n");
> []
> arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c: early_printk("ERROR: Microblaze " x "-different for PVR and DTS\n");
> arch/microblaze/kernel/cpu/cpuinfo-static.c: early_printk("ERROR: Microblaze " x "-different for kernel and DTS\n");
> []
> arch/tile/kernel/early_printk.c: early_printk("Kernel panic - not syncing: %pV", &vaf);
> []
> arch/x86/kernel/e820.c: early_printk(msg);
> arch/x86/kernel/head64.c: early_printk("Kernel alive\n");
> arch/x86/kernel/head_64.S: call early_printk
> []
> kernel/events/core.c: early_printk("perf interrupt took too long (%lld > %lld), lowering "
>
> So blackfin, m68k, and mips seems to have it possible to enable,
> but also don't appear at first glance to use it,
>
> Is early_printk really used by these architectures?
> Should it be removed?

The m68k "early_printk" match is not about the early_printk()
function, but about
the early printk functionality. Hence nothing to remove there.

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