cxl_pmem.ko uses memory_add_physaddr_to_nid() but ia64 does not export it, so this causes a build error: ERROR: modpost: "memory_add_physaddr_to_nid" [drivers/cxl/cxl_pmem.ko] undefined! Fix this by exporting that function. Fixes: 8c2676a5870a ("hot-add-mem x86_64: memory_add_physaddr_to_nid node fixup") Reported-by: kernel test robot <lkp@xxxxxxxxx> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Cc: Dan Williams <dan.j.williams@xxxxxxxxx> Cc: Ben Widawsky <bwidawsk@xxxxxxxxxx> Cc: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Cc: linux-ia64@xxxxxxxxxxxxxxx Cc: Arnd Bergmann <arnd@xxxxxxxx> Cc: Keith Mannthey <kmannth@xxxxxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- Arnd, can you take this in your one-off fixes arch tree, or would you prefer for Andrew to take it? arch/ia64/mm/numa.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/ia64/mm/numa.c +++ b/arch/ia64/mm/numa.c @@ -75,5 +75,6 @@ int memory_add_physaddr_to_nid(u64 addr) return 0; return nid; } +EXPORT_SYMBOL(memory_add_physaddr_to_nid); #endif #endif