On Thu, Jan 27, 2022 at 02:21:25PM +0100, Karolina Drobnik wrote: > Add a dummy io.h header. Rather begs the question of what memblock.c needs from linux/io.h. Wouldn't it be better to: +++ b/mm/memblock.c @@ -18,7 +18,6 @@ #include <linux/memblock.h> #include <asm/sections.h> -#include <linux/io.h> #include "internal.h" (allmodconfig on x86-64 builds fine with this; I have not done an extended sweep of other arches / build options).