On Wed, 31 Jul 2019, Geert Uytterhoeven wrote:
> 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?
>
I take it you meant to write <asm/atarihw.h> not <asm/amigahw.h>.
> 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?
>
Yes, it seems so. Thanks.
Here's the patch I tested.
diff --git a/arch/m68k/include/asm/atarihw.h b/arch/m68k/include/asm/atarihw.h
index 533008262b69..ba1889c1a933 100644
--- a/arch/m68k/include/asm/atarihw.h
+++ b/arch/m68k/include/asm/atarihw.h
@@ -22,7 +22,6 @@
#include <linux/types.h>
#include <asm/bootinfo-atari.h>
-#include <asm/raw_io.h>
#include <asm/kmap.h>
extern u_long atari_mch_cookie;
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>
I built 4 configurations - coldfire (mmu), atari, mac, atari + mac.
It's hard to imagine that removing those extra #defines would be a problem
given that doing so doesn't lead to compiler warnings or errors. The atari
build booted up okay in aranym.
--
> Thanks!
>
> Gr{oetje,eeting}s,
>
> Geert
>
>
