ZONE_DEVICE is not yet supported, fail if an altmap is passed, so we don't forget arch_add_memory()/arch_remove_memory() when unlocking support.
Cc: Martin Schwidefsky <schwidef...@de.ibm.com> Cc: Heiko Carstens <heiko.carst...@de.ibm.com> Cc: Andrew Morton <a...@linux-foundation.org> Cc: Michal Hocko <mho...@suse.com> Cc: Mike Rapoport <r...@linux.vnet.ibm.com> Cc: David Hildenbrand <da...@redhat.com> Cc: Vasily Gorbik <g...@linux.ibm.com> Cc: Oscar Salvador <osalva...@suse.com> Suggested-by: Dan Williams <dan.j.willi...@intel.com> Signed-off-by: David Hildenbrand <da...@redhat.com> --- arch/s390/mm/init.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index 14d1eae9fe43..d552e330fbcc 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -226,6 +226,9 @@ int arch_add_memory(int nid, u64 start, u64 size, unsigned long size_pages = PFN_DOWN(size); int rc; + if (WARN_ON_ONCE(restrictions->altmap)) + return -EINVAL; + rc = vmem_add_mapping(start, size); if (rc) return rc; -- 2.20.1