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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-01 18:22:55 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-01 18:22:55 -0800 |
commit | 6bba07c613e6663e5b8977eafec3cd3e63241e1c (patch) | |
tree | a650baf4e935976b10911306ffbe6b53d66f88c7 /arch/s390/mm | |
parent | d7e53922aa47b7a5a91bc34da00348e6ee0ed242 (diff) | |
parent | 892365ab4d29ed861709ee8611b53587ca2bb75f (diff) | |
download | linux-3.10-6bba07c613e6663e5b8977eafec3cd3e63241e1c.tar.gz linux-3.10-6bba07c613e6663e5b8977eafec3cd3e63241e1c.tar.bz2 linux-3.10-6bba07c613e6663e5b8977eafec3cd3e63241e1c.zip |
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
Diffstat (limited to 'arch/s390/mm')
-rw-r--r-- | arch/s390/mm/init.c | 30 |
1 files changed, 26 insertions, 4 deletions
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; |