diff options
Diffstat (limited to 'arch/s390/mm/init.c')
| -rw-r--r-- | arch/s390/mm/init.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index f0bee6af3960..4e5bbe328594 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -273,6 +273,9 @@ 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; @@ -283,16 +286,15 @@ int arch_add_memory(int nid, u64 start, u64 size, return rc; } -#ifdef CONFIG_MEMORY_HOTREMOVE void arch_remove_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap) { - /* - * There is no hardware or firmware interface which could trigger a - * hot memory remove on s390. So there is nothing that needs to be - * implemented. - */ - BUG(); + unsigned long start_pfn = start >> PAGE_SHIFT; + unsigned long nr_pages = size >> PAGE_SHIFT; + struct zone *zone; + + zone = page_zone(pfn_to_page(start_pfn)); + __remove_pages(zone, start_pfn, nr_pages, altmap); + vmem_remove_mapping(start, size); } -#endif #endif /* CONFIG_MEMORY_HOTPLUG */ |