memory hotplug: unify is_removable and offline detection code

[thirdparty/kernel/linux.git] / mm / memory_hotplug.c

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 4821338b4e4b02c8293a3fae50182d87a23667b4..b0dc65452973bafb38d4f0d7628dad1db9879f89 100644 (file)
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -602,27 +602,14 @@ static struct page *next_active_pageblock(struct page *page)
 /* Checks if this range of memory is likely to be hot-removable. */
 int is_mem_section_removable(unsigned long start_pfn, unsigned long nr_pages)
 {
-       int type;
        struct page *page = pfn_to_page(start_pfn);
        struct page *end_page = page + nr_pages;
 
        /* Check the starting page of each pageblock within the range */
        for (; page < end_page; page = next_active_pageblock(page)) {
-               type = get_pageblock_migratetype(page);
-
-               /*
-                * A pageblock containing MOVABLE or free pages is considered
-                * removable
-                */
-               if (type != MIGRATE_MOVABLE && !pageblock_free(page))
-                       return 0;
-
-               /*
-                * A pageblock starting with a PageReserved page is not
-                * considered removable.
-                */
-               if (PageReserved(page))
+               if (!is_pageblock_removable_nolock(page))
                        return 0;
+               cond_resched();
        }
 
        /* All pageblocks in the memory block are likely to be hot-removable */