memory-hotplug: remove memmap of sparse-vmemmap

[mirror_ubuntu-artful-kernel.git] / mm / sparse.c

diff --git a/mm/sparse.c b/mm/sparse.c
index 6b5fb762e2caf42eaeddeaef0cf8697175786cfd..46f6ea47d9ab36a263fea674c99045fd0cd80c5a 100644 (file)
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -615,10 +615,11 @@ static inline struct page *kmalloc_section_memmap(unsigned long pnum, int nid,
 }
 static void __kfree_section_memmap(struct page *memmap, unsigned long nr_pages)
 {
-       return; /* XXX: Not implemented yet */
+       vmemmap_free(memmap, nr_pages);
 }
 static void free_map_bootmem(struct page *memmap, unsigned long nr_pages)
 {
+       vmemmap_free(memmap, nr_pages);
 }
 #else
 static struct page *__kmalloc_section_memmap(unsigned long nr_pages)
@@ -796,8 +797,10 @@ static inline void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
 void sparse_remove_one_section(struct zone *zone, struct mem_section *ms)
 {
        struct page *memmap = NULL;
-       unsigned long *usemap = NULL;
+       unsigned long *usemap = NULL, flags;
+       struct pglist_data *pgdat = zone->zone_pgdat;
 
+       pgdat_resize_lock(pgdat, &flags);
        if (ms->section_mem_map) {
                usemap = ms->pageblock_flags;
                memmap = sparse_decode_mem_map(ms->section_mem_map,
@@ -805,6 +808,7 @@ void sparse_remove_one_section(struct zone *zone, struct mem_section *ms)
                ms->section_mem_map = 0;
                ms->pageblock_flags = NULL;
        }
+       pgdat_resize_unlock(pgdat, &flags);
 
        clear_hwpoisoned_pages(memmap, PAGES_PER_SECTION);
        free_section_usemap(memmap, usemap);