On Thu, 21 Aug 2025, Nathan Chancellor wrote:
> When building for a 32-bit platform (such as ARCH=i386 allmodconfig),
> there is a modpost error:
>
> ERROR: modpost: "__umoddi3" [drivers/md/dm-pcache/dm-pcache.ko] undefined!
>
> Hacking up the driver Makefile to allow building into the kernel shows
> that the division comes from get_kset_id(), which is inlined into
> cache_key_append() in cache_key.c.
>
> Use the helper div_u64_rem() to avoid emitting a libcall on 32-bit targets.
>
> Fixes: fd5cc4922bef ("dm-pcache: add persistent cache target in device-mapper")
> Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Thanks.
I folded it into the existing dm-pcache commit.
Mikulas
