Re: [PATCH] m68k: implement runtime consts

Daniel Palmer
2025-11-27T10:13:29Z

Hi test robot,

On Thu, 27 Nov 2025 at 10:59, kernel test robot <lkp@intel.com> wrote:
> All warnings (new ones prefixed by >>):
>
> In file included from fs/dcache.c:38:
> arch/m68k/include/asm/runtime-const.h: In function '__runtime_fixup_ptr':
> >> arch/m68k/include/asm/runtime-const.h:28:29: warning: unused variable 'end' [-Wunused-variable]
> 28 | const unsigned long end = start + sizeof(*value);
> | ^~~
> arch/m68k/include/asm/runtime-const.h: In function '__runtime_fixup_shift':
> arch/m68k/include/asm/runtime-const.h:51:29: warning: unused variable 'end' [-Wunused-variable]
> 51 | const unsigned long end = start + sizeof(*insn);
> | ^~~

I guess this is because allnoconfig results in CONFIG_MMU=n and that means
that the nommu defines for cache operations are used and those look like:
#define flush_icache_range(start, len) __flush_icache_all()

And the arguments getting passed aren't used. Also noticed that it's
start and len
there not start and end like everywhere else seems to be...

I guess the flush_icache_range macro needs to be tweaked to not
trigger the unused
warning but I'm not sure how right now.

Cheers,

Daniel