Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  [S390] memory hotplug: prevent memory zone interleave
  [S390] crash_dump: remove duplicate include
  [S390] KEYS: Enable the compat keyctl wrapper on s390x

3 files changed, 29 insertions, 5 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index d1727584230..6d99a5fcc09 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -227,6 +227,9 @@ config COMPAT
 config SYSVIPC_COMPAT
         def_bool y if COMPAT && SYSVIPC
 
+config KEYS_COMPAT
+        def_bool y if COMPAT && KEYS
+
 config AUDIT_ARCH
         def_bool y
 
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c
index 39f8fd4438f..c383ce440d9 100644
--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -11,7 +11,6 @@
 #include <linux/module.h>
 #include <linux/gfp.h>
 #include <linux/slab.h>
-#include <linux/crash_dump.h>
 #include <linux/bootmem.h>
 #include <linux/elf.h>
 #include <asm/ipl.h>
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 5d633019d8f..50236610de8 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -223,16 +223,38 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 #ifdef CONFIG_MEMORY_HOTPLUG
 int arch_add_memory(int nid, u64 start, u64 size)
 {
-        struct pglist_data *pgdat;
+        unsigned long zone_start_pfn, zone_end_pfn, nr_pages;
+        unsigned long start_pfn = PFN_DOWN(start);
+        unsigned long size_pages = PFN_DOWN(size);
         struct zone *zone;
         int rc;
 
-        pgdat = NODE_DATA(nid);
-        zone = pgdat->node_zones + ZONE_MOVABLE;
         rc = vmem_add_mapping(start, size);
         if (rc)
                 return rc;
-        rc = __add_pages(nid, zone, PFN_DOWN(start), PFN_DOWN(size));
+        for_each_zone(zone) {
+                if (zone_idx(zone) != ZONE_MOVABLE) {
+                        /* Add range within existing zone limits */
+                        zone_start_pfn = zone->zone_start_pfn;
+                        zone_end_pfn = zone->zone_start_pfn +
+                                       zone->spanned_pages;
+                } else {
+                        /* Add remaining range to ZONE_MOVABLE */
+                        zone_start_pfn = start_pfn;
+                        zone_end_pfn = start_pfn + size_pages;
+                }
+                if (start_pfn < zone_start_pfn || start_pfn >= zone_end_pfn)
+                        continue;
+                nr_pages = (start_pfn + size_pages > zone_end_pfn) ?
+                           zone_end_pfn - start_pfn : size_pages;
+                rc = __add_pages(nid, zone, start_pfn, nr_pages);
+                if (rc)
+                        break;
+                start_pfn += nr_pages;
+                size_pages -= nr_pages;
+                if (!size_pages)
+                        break;
+        }
         if (rc)
                 vmem_remove_mapping(start, size);
         return rc;