diff options
Diffstat (limited to 'mm/page_ext.c')
| -rw-r--r-- | mm/page_ext.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/mm/page_ext.c b/mm/page_ext.c index 641d93f6af4c..d7396a8970e5 100644 --- a/mm/page_ext.c +++ b/mm/page_ext.c @@ -369,25 +369,15 @@ static void __invalidate_page_ext(unsigned long pfn) } static int __meminit online_page_ext(unsigned long start_pfn, - unsigned long nr_pages, - int nid) + unsigned long nr_pages) { + int nid = pfn_to_nid(start_pfn); unsigned long start, end, pfn; int fail = 0; start = SECTION_ALIGN_DOWN(start_pfn); end = SECTION_ALIGN_UP(start_pfn + nr_pages); - if (nid == NUMA_NO_NODE) { - /* - * In this case, "nid" already exists and contains valid memory. - * "start_pfn" passed to us is a pfn which is an arg for - * online__pages(), and start_pfn should exist. - */ - nid = pfn_to_nid(start_pfn); - VM_BUG_ON(!node_online(nid)); - } - for (pfn = start; !fail && pfn < end; pfn += PAGES_PER_SECTION) fail = init_section_page_ext(pfn, nid); if (!fail) @@ -435,8 +425,7 @@ static int __meminit page_ext_callback(struct notifier_block *self, switch (action) { case MEM_GOING_ONLINE: - ret = online_page_ext(mn->start_pfn, - mn->nr_pages, mn->status_change_nid); + ret = online_page_ext(mn->start_pfn, mn->nr_pages); break; case MEM_OFFLINE: offline_page_ext(mn->start_pfn, @@ -508,6 +497,19 @@ void __meminit pgdat_page_ext_init(struct pglist_data *pgdat) #endif /** + * page_ext_lookup() - Lookup a page extension for a PFN. + * @pfn: PFN of the page we're interested in. + * + * Must be called with RCU read lock taken and @pfn must be valid. + * + * Return: NULL if no page_ext exists for this page. + */ +struct page_ext *page_ext_lookup(unsigned long pfn) +{ + return lookup_page_ext(pfn_to_page(pfn)); +} + +/** * page_ext_get() - Get the extended information for a page. * @page: The page we're interested in. * |