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.
If the convention is to put #ifdef around code like that then I guess
that's what we should do here too...
Reviewed-by: Finn Thain <[email protected]>
--
> Regards
> Greg
>
