Hi Finn,
On Wed, Jul 31, 2019 at 9:47 AM Finn Thain <[email protected]> wrote:
> On Wed, 31 Jul 2019, Greg Ungerer wrote:
> > No, not sufficient. You still get the following warnings after
> > just moving that include of atarihw.h:
> >
> > CC arch/m68k/kernel/setup.o
> > In file included from arch/m68k/kernel/setup_mm.c:48:0,
> > from arch/m68k/kernel/setup.c:3:
> > ./arch/m68k/include/asm/macintosh.h:19:35: warning: 'struct irq_data'
> > declared inside parameter list
> > extern void mac_irq_enable(struct irq_data *data);
> > ^
> > ./arch/m68k/include/asm/macintosh.h:19:35: warning: its scope is only this
> > definition or declaration, which is probably not what you want
> > ./arch/m68k/include/asm/macintosh.h:20:36: warning: 'struct irq_data'
> > declared inside parameter list
> > extern void mac_irq_disable(struct irq_data *data);
> >
>
> The warning can be resolved with,
>
> diff --git a/arch/m68k/include/asm/macintosh.h
> b/arch/m68k/include/asm/macintosh.h
> index d9a08bed4b12..f653b60f2afc 100644
> --- a/arch/m68k/include/asm/macintosh.h
> +++ b/arch/m68k/include/asm/macintosh.h
> @@ -4,6 +4,7 @@
>
> #include <linux/seq_file.h>
> #include <linux/interrupt.h>
> +#include <linux/irq.h>
>
> #include <asm/bootinfo-mac.h>
>
> so that macintosh.h could be unconditionally included to avoid some
> #ifdefs. That's just BTW. I don't object to your solution.
>
> >
> > The MACH_IS_ATARI is not guaranteed to be compile time constant,
> > depending on what target options you have configured.
> >
>
> Actually, MACH_IS_ATARI is a compile-time constant when CONFIG_ATARI=n.
>
> When I build that file with mac_defconfig and gcc 6.4, the C preprocessor
> generates this:
>
> if ((0))
> unknown = amiga_parse_bootinfo(record);
> else if ((0))
> unknown = atari_parse_bootinfo(record);
> else if ((1))
> unknown = mac_parse_bootinfo(record);
> else if ((0))
> unknown = q40_parse_bootinfo(record);
> else if ((0))
> unknown = bvme6000_parse_bootinfo(record);
> else if ((0))
> unknown = mvme16x_parse_bootinfo(record);
> else if ((0))
> unknown = mvme147_parse_bootinfo(record);
> else if ((0))
> unknown = hp300_parse_bootinfo(record);
> else if ((0))
> unknown = apollo_parse_bootinfo(record);
> else
> unknown = 1;
>
> We don't get that "implicit declaration" warning because the function
> prototypes are all declared unconditionally at the top of the same file.
>
> Anyway, the warning we were discussing was this one:
>
> arch/m68k/kernel/setup_mm.c: In function 'm68k_nvram_get_size':
> arch/m68k/kernel/setup_mm.c:605:10: error: implicit declaration of
> function 'atari_nvram_get_size' [-Werror=implicit-function-declaration]
> return atari_nvram_get_size();
>
> This warning is the reason why commit d3b41b6bb49e ("m68k: Dispatch
> nvram_ops calls to Atari or Mac functions") unconditionally included
> atarihw.h.
>
> It's annoying that we can't unconditionally include atarihw.h but I don't
> have a solution for that.
The real issue is <asm/amigahw.h> including <asm/raw_io.h>, right?
At first sight, the only reason for that is:
#define atari_readb raw_inb
#define atari_writeb raw_outb
#define atari_inb_p raw_inb
#define atari_outb_p raw_outb
Note that the first definition is unused, and the other 3 have only a handful
users.
At second sight, the <asm/raw_io.h> include can just be removed, an Atari
kernel still builds fine...
Would that fix the issue?
Thanks!
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
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
