kexec (PPC64) code calls memory_hotplug_max(). Add the header declaration for it from <asm/mmzone.h>. Using <linux/mmzone.h> does not work since the #include for <asm/mmzone.h> depends on CONFIG_NUMA=y, which is not set in this kernel config file.
Fixes this build error/warning: ../arch/powerpc/kexec/file_load_64.c: In function 'kexec_extra_fdt_size_ppc64': ../arch/powerpc/kexec/file_load_64.c:993:33: error: implicit declaration of function 'memory_hotplug_max' [-Werror=implicit-function-declaration] 993 | usm_entries = ((memory_hotplug_max() / drmem_lmb_size()) + | ^~~~~~~~~~~~~~~~~~ Fixes: fc546faa5595 ("powerpc/kexec_file: Count hot-pluggable memory in FDT estimate") Signed-off-by: Randy Dunlap <rdun...@infradead.org> Cc: Sourabh Jain <sourabhj...@linux.ibm.com> Cc: Michael Ellerman <m...@ellerman.id.au> Cc: linuxppc-dev@lists.ozlabs.org --- arch/powerpc/kexec/file_load_64.c | 1 + 1 file changed, 1 insertion(+) diff -- a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c --- a/arch/powerpc/kexec/file_load_64.c +++ b/arch/powerpc/kexec/file_load_64.c @@ -26,6 +26,7 @@ #include <asm/firmware.h> #include <asm/kexec_ranges.h> #include <asm/crashdump-ppc64.h> +#include <asm/mmzone.h> #include <asm/prom.h> struct umem_info {