Hi Greg,

On Tue, Jul 3, 2018 at 4:13 AM Greg Ungerer [off-list ref] wrote:

On 02/07/18 23:35, Geert Uytterhoeven wrote:

quoted

   - Add missing define guard for ioremap_wt(),
   - Fix typo s/ioremap_fillcache/ioremap_fullcache/,
   - Add define guard for iounmap() for consistency with other
     architectures.

Fixes: 9746882f547d2f00 ("m68k: group io mapping definitions and functions")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

If I build for the m5475evb defconfig then I get warnings like this:

   CC      init/main.o
In file included from ./include/asm-generic/io.h:19:0,
                  from ./arch/m68k/include/asm/io_no.h:147,
                  from ./arch/m68k/include/asm/io.h:3,
                  from ./include/linux/bio.h:28,
                  from ./include/linux/blkdev.h:21,
                  from init/main.c:80:
./include/asm-generic/iomap.h:79:0: warning: "ioremap_wt" redefined
  #define ioremap_wt ioremap_nocache
  ^
In file included from ./arch/m68k/include/asm/io_no.h:145:0,
                  from ./arch/m68k/include/asm/io.h:3,
                  from ./include/linux/bio.h:28,
                  from ./include/linux/blkdev.h:21,
                  from init/main.c:80:
./arch/m68k/include/asm/kmap.h:37:0: note: this is the location of the previous definition
  #define ioremap_wt ioremap_wt
  ^

Thanks, I did some m68knommu compile tests, but didn't see this warning, which
happens for Coldfire+MMU only.

The issue is that there are two ways to declare an architecture has
ioremap_wt():
  1. By defining ioremap_wt,
  2. By defining ARCH_HAS_IOREMAP_WT.

1 is done in arch/m68k/include/asm/kmap.h.
2 is done in arch/m68k/include/asm/io_mm.h. Moving that to kmap.h fixes
the warning. Will send an update shortly.

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