Merge branch 'akpm' (patches from Andrew)

Merge updates from Andrew Morton:

 - a few misc things

 - a few Y2038 fixes

 - ntfs fixes

 - arch/sh tweaks

 - ocfs2 updates

 - most of MM

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (111 commits)
  mm/hmm.c: remove unused variables align_start and align_end
  fs/userfaultfd.c: remove redundant pointer uwq
  mm, vmacache: hash addresses based on pmd
  mm/list_lru: introduce list_lru_shrink_walk_irq()
  mm/list_lru.c: pass struct list_lru_node* as an argument to __list_lru_walk_one()
  mm/list_lru.c: move locking from __list_lru_walk_one() to its caller
  mm/list_lru.c: use list_lru_walk_one() in list_lru_walk_node()
  mm, swap: make CONFIG_THP_SWAP depend on CONFIG_SWAP
  mm/sparse: delete old sparse_init and enable new one
  mm/sparse: add new sparse_init_nid() and sparse_init()
  mm/sparse: move buffer init/fini to the common place
  mm/sparse: use the new sparse buffer functions in non-vmemmap
  mm/sparse: abstract sparse buffer allocations
  mm/hugetlb.c: don't zero 1GiB bootmem pages
  mm, page_alloc: double zone's batchsize
  mm/oom_kill.c: document oom_lock
  mm/hugetlb: remove gigantic page support for HIGHMEM
  mm, oom: remove sleep from under oom_lock
  kernel/dma: remove unsupported gfp_mask parameter from dma_alloc_from_contiguous()
  mm/cma: remove unsupported gfp_mask parameter from cma_alloc()
  ...

1 files changed, 6 insertions, 43 deletions

diff --git a/drivers/base/node.c b/drivers/base/node.c
index a5e821d09656..1ac4c36e13bb 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -399,18 +399,12 @@ static int __ref get_nid_for_pfn(unsigned long pfn)
 }
 
 /* register memory section under specified node if it spans that node */
-int register_mem_sect_under_node(struct memory_block *mem_blk, int nid,
-				 bool check_nid)
+int register_mem_sect_under_node(struct memory_block *mem_blk, void *arg)
 {
-	int ret;
+	int ret, nid = *(int *)arg;
 	unsigned long pfn, sect_start_pfn, sect_end_pfn;
 
-	if (!mem_blk)
-		return -EFAULT;
-
 	mem_blk->nid = nid;
-	if (!node_online(nid))
-		return 0;
 
 	sect_start_pfn = section_nr_to_pfn(mem_blk->start_section_nr);
 	sect_end_pfn = section_nr_to_pfn(mem_blk->end_section_nr);
@@ -433,7 +427,7 @@ int register_mem_sect_under_node(struct memory_block *mem_blk, int nid,
 		 * case, during hotplug we know that all pages in the memory
 		 * block belong to the same node.
 		 */
-		if (check_nid) {
+		if (system_state == SYSTEM_BOOTING) {
 			page_nid = get_nid_for_pfn(pfn);
 			if (page_nid < 0)
 				continue;
@@ -490,41 +484,10 @@ int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
 	return 0;
 }
 
-int link_mem_sections(int nid, unsigned long start_pfn, unsigned long nr_pages,
-		      bool check_nid)
+int link_mem_sections(int nid, unsigned long start_pfn, unsigned long end_pfn)
 {
-	unsigned long end_pfn = start_pfn + nr_pages;
-	unsigned long pfn;
-	struct memory_block *mem_blk = NULL;
-	int err = 0;
-
-	for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) {
-		unsigned long section_nr = pfn_to_section_nr(pfn);
-		struct mem_section *mem_sect;
-		int ret;
-
-		if (!present_section_nr(section_nr))
-			continue;
-		mem_sect = __nr_to_section(section_nr);
-
-		/* same memblock ? */
-		if (mem_blk)
-			if ((section_nr >= mem_blk->start_section_nr) &&
-			    (section_nr <= mem_blk->end_section_nr))
-				continue;
-
-		mem_blk = find_memory_block_hinted(mem_sect, mem_blk);
-
-		ret = register_mem_sect_under_node(mem_blk, nid, check_nid);
-		if (!err)
-			err = ret;
-
-		/* discard ref obtained in find_memory_block() */
-	}
-
-	if (mem_blk)
-		kobject_put(&mem_blk->dev.kobj);
-	return err;
+	return walk_memory_range(start_pfn, end_pfn, (void *)&nid,
+					register_mem_sect_under_node);
 }
 
 #ifdef CONFIG_HUGETLBFS