dm snapshot: add missing module aliases

[platform/adaptation/renesas_rcar/renesas_kernel.git] / mm / sparse.c

diff --git a/mm/sparse.c b/mm/sparse.c
index a83de2f..7ca6dc8 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)
@@ -638,7 +639,6 @@ static struct page *__kmalloc_section_memmap(unsigned long nr_pages)
 got_map_page:
        ret = (struct page *)pfn_to_kaddr(page_to_pfn(page));
 got_map_ptr:
-       memset(ret, 0, memmap_size);
 
        return ret;
 }
@@ -698,7 +698,7 @@ static void free_section_usemap(struct page *memmap, unsigned long *usemap)
        /*
         * Check to see if allocation came from hot-plug-add
         */
-       if (PageSlab(usemap_page)) {
+       if (PageSlab(usemap_page) || PageCompound(usemap_page)) {
                kfree(usemap);
                if (memmap)
                        __kfree_section_memmap(memmap, PAGES_PER_SECTION);
@@ -758,6 +758,8 @@ int __meminit sparse_add_one_section(struct zone *zone, unsigned long start_pfn,
                goto out;
        }
 
+       memset(memmap, 0, sizeof(struct page) * nr_pages);
+
        ms->section_mem_map |= SECTION_MARKED_PRESENT;
 
        ret = sparse_init_one_section(ms, section_nr, memmap, usemap);
@@ -771,11 +773,34 @@ out:
        return ret;
 }
 
+#ifdef CONFIG_MEMORY_FAILURE
+static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
+{
+       int i;
+
+       if (!memmap)
+               return;
+
+       for (i = 0; i < PAGES_PER_SECTION; i++) {
+               if (PageHWPoison(&memmap[i])) {
+                       atomic_long_sub(1, &num_poisoned_pages);
+                       ClearPageHWPoison(&memmap[i]);
+               }
+       }
+}
+#else
+static inline void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
+{
+}
+#endif
+
 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,
@@ -783,7 +808,9 @@ 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);
 }
 #endif