Merge branch 'reset/of-get-optional-exclusive' of git://git.pengutronix.de/pza/linux into timers/drivers/next

"Add optional variant of of_reset_control_get_exclusive(). If the
requested reset is not specified in the device tree, this function
returns NULL instead of an error."

This dependency is needed for the Generic Timer Module (a.k.a OSTM)
support for RZ/G2L.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

1 files changed, 137 insertions, 122 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 856b175c15a4..c5952749ad40 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -594,8 +594,6 @@ static int page_outside_zone_boundaries(struct zone *zone, struct page *page)
 
 static int page_is_consistent(struct zone *zone, struct page *page)
 {
-	if (!pfn_valid_within(page_to_pfn(page)))
-		return 0;
 	if (zone != page_zone(page))
 		return 0;
 
@@ -679,10 +677,8 @@ static inline int pindex_to_order(unsigned int pindex)
 	int order = pindex / MIGRATE_PCPTYPES;
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
-	if (order > PAGE_ALLOC_COSTLY_ORDER) {
+	if (order > PAGE_ALLOC_COSTLY_ORDER)
 		order = pageblock_order;
-		VM_BUG_ON(order != pageblock_order);
-	}
 #else
 	VM_BUG_ON(order > PAGE_ALLOC_COSTLY_ORDER);
 #endif
@@ -726,7 +722,7 @@ static inline void free_the_page(struct page *page, unsigned int order)
 
 void free_compound_page(struct page *page)
 {
-	mem_cgroup_uncharge(page);
+	mem_cgroup_uncharge(page_folio(page));
 	free_the_page(page, compound_order(page));
 }
 
@@ -1025,16 +1021,12 @@ buddy_merge_likely(unsigned long pfn, unsigned long buddy_pfn,
 	if (order >= MAX_ORDER - 2)
 		return false;
 
-	if (!pfn_valid_within(buddy_pfn))
-		return false;
-
 	combined_pfn = buddy_pfn & pfn;
 	higher_page = page + (combined_pfn - pfn);
 	buddy_pfn = __find_buddy_pfn(combined_pfn, order + 1);
 	higher_buddy = higher_page + (buddy_pfn - combined_pfn);
 
-	return pfn_valid_within(buddy_pfn) &&
-	       page_is_buddy(higher_page, higher_buddy, order + 1);
+	return page_is_buddy(higher_page, higher_buddy, order + 1);
 }
 
 /*
@@ -1095,8 +1087,6 @@ continue_merging:
 		buddy_pfn = __find_buddy_pfn(pfn, order);
 		buddy = page + (buddy_pfn - pfn);
 
-		if (!pfn_valid_within(buddy_pfn))
-			goto done_merging;
 		if (!page_is_buddy(page, buddy, order))
 			goto done_merging;
 		/*
@@ -1320,8 +1310,10 @@ static __always_inline bool free_pages_prepare(struct page *page,
 
 		VM_BUG_ON_PAGE(compound && compound_order(page) != order, page);
 
-		if (compound)
+		if (compound) {
 			ClearPageDoubleMap(page);
+			ClearPageHasHWPoisoned(page);
+		}
 		for (i = 1; i < (1 << order); i++) {
 			if (compound)
 				bad += free_tail_pages_check(page, page + i);
@@ -1436,14 +1428,8 @@ static inline void prefetch_buddy(struct page *page)
 
 /*
  * Frees a number of pages from the PCP lists
- * Assumes all pages on list are in same zone, and of same order.
+ * Assumes all pages on list are in same zone.
  * count is the number of pages to free.
- *
- * If the zone was previously in an "all pages pinned" state then look to
- * see if this freeing clears that state.
- *
- * And clear the zone's pages_scanned counter, to hold off the "all pages are
- * pinned" detection logic.
  */
 static void free_pcppages_bulk(struct zone *zone, int count,
 					struct per_cpu_pages *pcp)
@@ -1597,7 +1583,7 @@ static void __meminit init_reserved_page(unsigned long pfn)
 	for (zid = 0; zid < MAX_NR_ZONES; zid++) {
 		struct zone *zone = &pgdat->node_zones[zid];
 
-		if (pfn >= zone->zone_start_pfn && pfn < zone_end_pfn(zone))
+		if (zone_spans_pfn(zone, pfn))
 			break;
 	}
 	__init_single_page(pfn_to_page(pfn), pfn, zid, nid);
@@ -1754,9 +1740,7 @@ void __init memblock_free_pages(struct page *page, unsigned long pfn,
 /*
  * Check that the whole (or subset of) a pageblock given by the interval of
  * [start_pfn, end_pfn) is valid and within the same zone, before scanning it
- * with the migration of free compaction scanner. The scanners then need to
- * use only pfn_valid_within() check for arches that allow holes within
- * pageblocks.
+ * with the migration of free compaction scanner.
  *
  * Return struct page pointer of start_pfn, or NULL if checks were not passed.
  *
@@ -1872,8 +1856,6 @@ static inline void __init pgdat_init_report_one_done(void)
  */
 static inline bool __init deferred_pfn_valid(unsigned long pfn)
 {
-	if (!pfn_valid_within(pfn))
-		return false;
 	if (!(pfn & (pageblock_nr_pages - 1)) && !pfn_valid(pfn))
 		return false;
 	return true;
@@ -2520,11 +2502,6 @@ static int move_freepages(struct zone *zone,
 	int pages_moved = 0;
 
 	for (pfn = start_pfn; pfn <= end_pfn;) {
-		if (!pfn_valid_within(pfn)) {
-			pfn++;
-			continue;
-		}
-
 		page = pfn_to_page(pfn);
 		if (!PageBuddy(page)) {
 			/*
@@ -3164,9 +3141,9 @@ static void drain_local_pages_wq(struct work_struct *work)
 	 * cpu which is alright but we also have to make sure to not move to
 	 * a different one.
 	 */
-	preempt_disable();
+	migrate_disable();
 	drain_local_pages(drain->zone);
-	preempt_enable();
+	migrate_enable();
 }
 
 /*
@@ -3445,27 +3422,20 @@ void free_unref_page_list(struct list_head *list)
 	/* Prepare pages for freeing */
 	list_for_each_entry_safe(page, next, list, lru) {
 		pfn = page_to_pfn(page);
-		if (!free_unref_page_prepare(page, pfn, 0))
+		if (!free_unref_page_prepare(page, pfn, 0)) {
 			list_del(&page->lru);
+			continue;
+		}
 
 		/*
 		 * Free isolated pages directly to the allocator, see
 		 * comment in free_unref_page.
 		 */
 		migratetype = get_pcppage_migratetype(page);
-		if (unlikely(migratetype >= MIGRATE_PCPTYPES)) {
-			if (unlikely(is_migrate_isolate(migratetype))) {
-				list_del(&page->lru);
-				free_one_page(page_zone(page), page, pfn, 0,
-							migratetype, FPI_NONE);
-				continue;
-			}
-
-			/*
-			 * Non-isolated types over MIGRATE_PCPTYPES get added
-			 * to the MIGRATE_MOVABLE pcp list.
-			 */
-			set_pcppage_migratetype(page, MIGRATE_MOVABLE);
+		if (unlikely(is_migrate_isolate(migratetype))) {
+			list_del(&page->lru);
+			free_one_page(page_zone(page), page, pfn, 0, migratetype, FPI_NONE);
+			continue;
 		}
 
 		set_page_private(page, pfn);
@@ -3475,7 +3445,15 @@ void free_unref_page_list(struct list_head *list)
 	list_for_each_entry_safe(page, next, list, lru) {
 		pfn = page_private(page);
 		set_page_private(page, 0);
+
+		/*
+		 * Non-isolated types over MIGRATE_PCPTYPES get added
+		 * to the MIGRATE_MOVABLE pcp list.
+		 */
 		migratetype = get_pcppage_migratetype(page);
+		if (unlikely(migratetype >= MIGRATE_PCPTYPES))
+			migratetype = MIGRATE_MOVABLE;
+
 		trace_mm_page_free_batched(page);
 		free_unref_page_commit(page, pfn, migratetype, 0);
 
@@ -3982,6 +3960,8 @@ bool zone_watermark_ok_safe(struct zone *z, unsigned int order,
 }
 
 #ifdef CONFIG_NUMA
+int __read_mostly node_reclaim_distance = RECLAIM_DISTANCE;
+
 static bool zone_allows_reclaim(struct zone *local_zone, struct zone *zone)
 {
 	return node_distance(zone_to_nid(local_zone), zone_to_nid(zone)) <=
@@ -4212,7 +4192,7 @@ static void warn_alloc_show_mem(gfp_t gfp_mask, nodemask_t *nodemask)
 		if (tsk_is_oom_victim(current) ||
 		    (current->flags & (PF_MEMALLOC | PF_EXITING)))
 			filter &= ~SHOW_MEM_FILTER_NODES;
-	if (in_interrupt() || !(gfp_mask & __GFP_DIRECT_RECLAIM))
+	if (!in_task() || !(gfp_mask & __GFP_DIRECT_RECLAIM))
 		filter &= ~SHOW_MEM_FILTER_NODES;
 
 	show_mem(filter, nodemask);
@@ -4550,14 +4530,14 @@ static bool __need_reclaim(gfp_t gfp_mask)
 	return true;
 }
 
-void __fs_reclaim_acquire(void)
+void __fs_reclaim_acquire(unsigned long ip)
 {
-	lock_map_acquire(&__fs_reclaim_map);
+	lock_acquire_exclusive(&__fs_reclaim_map, 0, 0, NULL, ip);
 }
 
-void __fs_reclaim_release(void)
+void __fs_reclaim_release(unsigned long ip)
 {
-	lock_map_release(&__fs_reclaim_map);
+	lock_release(&__fs_reclaim_map, ip);
 }
 
 void fs_reclaim_acquire(gfp_t gfp_mask)
@@ -4566,7 +4546,7 @@ void fs_reclaim_acquire(gfp_t gfp_mask)
 
 	if (__need_reclaim(gfp_mask)) {
 		if (gfp_mask & __GFP_FS)
-			__fs_reclaim_acquire();
+			__fs_reclaim_acquire(_RET_IP_);
 
 #ifdef CONFIG_MMU_NOTIFIER
 		lock_map_acquire(&__mmu_notifier_invalidate_range_start_map);
@@ -4583,7 +4563,7 @@ void fs_reclaim_release(gfp_t gfp_mask)
 
 	if (__need_reclaim(gfp_mask)) {
 		if (gfp_mask & __GFP_FS)
-			__fs_reclaim_release();
+			__fs_reclaim_release(_RET_IP_);
 	}
 }
 EXPORT_SYMBOL_GPL(fs_reclaim_release);
@@ -4698,7 +4678,7 @@ gfp_to_alloc_flags(gfp_t gfp_mask)
 		 * comment for __cpuset_node_allowed().
 		 */
 		alloc_flags &= ~ALLOC_CPUSET;
-	} else if (unlikely(rt_task(current)) && !in_interrupt())
+	} else if (unlikely(rt_task(current)) && in_task())
 		alloc_flags |= ALLOC_HARDER;
 
 	alloc_flags = gfp_to_alloc_flags_cma(gfp_mask, alloc_flags);
@@ -4811,30 +4791,11 @@ should_reclaim_retry(gfp_t gfp_mask, unsigned order,
 		trace_reclaim_retry_zone(z, order, reclaimable,
 				available, min_wmark, *no_progress_loops, wmark);
 		if (wmark) {
-			/*
-			 * If we didn't make any progress and have a lot of
-			 * dirty + writeback pages then we should wait for
-			 * an IO to complete to slow down the reclaim and
-			 * prevent from pre mature OOM
-			 */
-			if (!did_some_progress) {
-				unsigned long write_pending;
-
-				write_pending = zone_page_state_snapshot(zone,
-							NR_ZONE_WRITE_PENDING);
-
-				if (2 * write_pending > reclaimable) {
-					congestion_wait(BLK_RW_ASYNC, HZ/10);
-					return true;
-				}
-			}
-
 			ret = true;
-			goto out;
+			break;
 		}
 	}
 
-out:
 	/*
 	 * Memory allocation/reclaim might be called from a WQ context and the
 	 * current implementation of the WQ concurrency control doesn't
@@ -4930,6 +4891,19 @@ retry_cpuset:
 	if (!ac->preferred_zoneref->zone)
 		goto nopage;
 
+	/*
+	 * Check for insane configurations where the cpuset doesn't contain
+	 * any suitable zone to satisfy the request - e.g. non-movable
+	 * GFP_HIGHUSER allocations from MOVABLE nodes only.
+	 */
+	if (cpusets_insane_config() && (gfp_mask & __GFP_HARDWALL)) {
+		struct zoneref *z = first_zones_zonelist(ac->zonelist,
+					ac->highest_zoneidx,
+					&cpuset_current_mems_allowed);
+		if (!z->zone)
+			goto nopage;
+	}
+
 	if (alloc_flags & ALLOC_KSWAPD)
 		wake_all_kswapds(order, gfp_mask, ac);
 
@@ -5158,7 +5132,7 @@ static inline bool prepare_alloc_pages(gfp_t gfp_mask, unsigned int order,
 		 * When we are in the interrupt context, it is irrelevant
 		 * to the current task context. It means that any node ok.
 		 */
-		if (!in_interrupt() && !ac->nodemask)
+		if (in_task() && !ac->nodemask)
 			ac->nodemask = &cpuset_current_mems_allowed;
 		else
 			*alloc_flags |= ALLOC_CPUSET;
@@ -5239,6 +5213,10 @@ unsigned long __alloc_pages_bulk(gfp_t gfp, int preferred_nid,
 	if (unlikely(page_array && nr_pages - nr_populated == 0))
 		goto out;
 
+	/* Bulk allocator does not support memcg accounting. */
+	if (memcg_kmem_enabled() && (gfp & __GFP_ACCOUNT))
+		goto failed;
+
 	/* Use the single page allocator for one page. */
 	if (nr_pages - nr_populated == 1)
 		goto failed;
@@ -5416,6 +5394,18 @@ out:
 }
 EXPORT_SYMBOL(__alloc_pages);
 
+struct folio *__folio_alloc(gfp_t gfp, unsigned int order, int preferred_nid,
+		nodemask_t *nodemask)
+{
+	struct page *page = __alloc_pages(gfp | __GFP_COMP, order,
+			preferred_nid, nodemask);
+
+	if (page && order > 1)
+		prep_transhuge_page(page);
+	return (struct folio *)page;
+}
+EXPORT_SYMBOL(__folio_alloc);
+
 /*
  * Common helper functions. Never use with __GFP_HIGHMEM because the returned
  * address cannot represent highmem pages. Use alloc_pages and then kmap if
@@ -5628,8 +5618,8 @@ void *alloc_pages_exact(size_t size, gfp_t gfp_mask)
 	unsigned int order = get_order(size);
 	unsigned long addr;
 
-	if (WARN_ON_ONCE(gfp_mask & __GFP_COMP))
-		gfp_mask &= ~__GFP_COMP;
+	if (WARN_ON_ONCE(gfp_mask & (__GFP_COMP | __GFP_HIGHMEM)))
+		gfp_mask &= ~(__GFP_COMP | __GFP_HIGHMEM);
 
 	addr = __get_free_pages(gfp_mask, order);
 	return make_alloc_exact(addr, order, size);
@@ -5653,8 +5643,8 @@ void * __meminit alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask)
 	unsigned int order = get_order(size);
 	struct page *p;
 
-	if (WARN_ON_ONCE(gfp_mask & __GFP_COMP))
-		gfp_mask &= ~__GFP_COMP;
+	if (WARN_ON_ONCE(gfp_mask & (__GFP_COMP | __GFP_HIGHMEM)))
+		gfp_mask &= ~(__GFP_COMP | __GFP_HIGHMEM);
 
 	p = alloc_pages_node(nid, gfp_mask, order);
 	if (!p)
@@ -5904,6 +5894,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
 		" unevictable:%lu dirty:%lu writeback:%lu\n"
 		" slab_reclaimable:%lu slab_unreclaimable:%lu\n"
 		" mapped:%lu shmem:%lu pagetables:%lu bounce:%lu\n"
+		" kernel_misc_reclaimable:%lu\n"
 		" free:%lu free_pcp:%lu free_cma:%lu\n",
 		global_node_page_state(NR_ACTIVE_ANON),
 		global_node_page_state(NR_INACTIVE_ANON),
@@ -5920,6 +5911,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
 		global_node_page_state(NR_SHMEM),
 		global_node_page_state(NR_PAGETABLE),
 		global_zone_page_state(NR_BOUNCE),
+		global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE),
 		global_zone_page_state(NR_FREE_PAGES),
 		free_pcp,
 		global_zone_page_state(NR_FREE_CMA_PAGES));
@@ -5994,6 +5986,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
 		printk(KERN_CONT
 			"%s"
 			" free:%lukB"
+			" boost:%lukB"
 			" min:%lukB"
 			" low:%lukB"
 			" high:%lukB"
@@ -6014,6 +6007,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
 			"\n",
 			zone->name,
 			K(zone_page_state(zone, NR_FREE_PAGES)),
+			K(zone->watermark_boost),
 			K(min_wmark_pages(zone)),
 			K(low_wmark_pages(zone)),
 			K(high_wmark_pages(zone)),
@@ -6156,7 +6150,7 @@ static int node_load[MAX_NUMNODES];
  *
  * Return: node id of the found node or %NUMA_NO_NODE if no node is found.
  */
-static int find_next_best_node(int node, nodemask_t *used_node_mask)
+int find_next_best_node(int node, nodemask_t *used_node_mask)
 {
 	int n, val;
 	int min_val = INT_MAX;
@@ -6269,7 +6263,7 @@ static void build_zonelists(pg_data_t *pgdat)
 		 */
 		if (node_distance(local_node, node) !=
 		    node_distance(local_node, prev_node))
-			node_load[node] = load;
+			node_load[node] += load;
 
 		node_order[nr_nodes++] = node;
 		prev_node = node;
@@ -6278,6 +6272,10 @@ static void build_zonelists(pg_data_t *pgdat)
 
 	build_zonelists_in_node_order(pgdat, node_order, nr_nodes);
 	build_thisnode_zonelists(pgdat);
+	pr_info("Fallback order for Node %d: ", local_node);
+	for (node = 0; node < nr_nodes; node++)
+		pr_cont("%d ", node_order[node]);
+	pr_cont("\n");
 }
 
 #ifdef CONFIG_HAVE_MEMORYLESS_NODES
@@ -6641,7 +6639,6 @@ static void __meminit zone_init_free_lists(struct zone *zone)
 	}
 }
 
-#if !defined(CONFIG_FLATMEM)
 /*
  * Only struct pages that correspond to ranges defined by memblock.memory
  * are zeroed and initialized by going through __init_single_page() during
@@ -6686,13 +6683,6 @@ static void __init init_unavailable_range(unsigned long spfn,
 		pr_info("On node %d, zone %s: %lld pages in unavailable ranges",
 			node, zone_names[zone], pgcnt);
 }
-#else
-static inline void init_unavailable_range(unsigned long spfn,
-					  unsigned long epfn,
-					  int zone, int node)
-{
-}
-#endif
 
 static void __init memmap_init_zone_range(struct zone *zone,
 					  unsigned long start_pfn,
@@ -6722,7 +6712,7 @@ static void __init memmap_init(void)
 {
 	unsigned long start_pfn, end_pfn;
 	unsigned long hole_pfn = 0;
-	int i, j, zone_id, nid;
+	int i, j, zone_id = 0, nid;
 
 	for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, &nid) {
 		struct pglist_data *node = NODE_DATA(nid);
@@ -6755,6 +6745,26 @@ static void __init memmap_init(void)
 		init_unavailable_range(hole_pfn, end_pfn, zone_id, nid);
 }
 
+void __init *memmap_alloc(phys_addr_t size, phys_addr_t align,
+			  phys_addr_t min_addr, int nid, bool exact_nid)
+{
+	void *ptr;
+
+	if (exact_nid)
+		ptr = memblock_alloc_exact_nid_raw(size, align, min_addr,
+						   MEMBLOCK_ALLOC_ACCESSIBLE,
+						   nid);
+	else
+		ptr = memblock_alloc_try_nid_raw(size, align, min_addr,
+						 MEMBLOCK_ALLOC_ACCESSIBLE,
+						 nid);
+
+	if (ptr && size > 0)
+		page_init_poison(ptr, size);
+
+	return ptr;
+}
+
 static int zone_batchsize(struct zone *zone)
 {
 #ifdef CONFIG_MMU
@@ -7258,6 +7268,9 @@ static void __init calculate_node_totalpages(struct pglist_data *pgdat,
 			zone->zone_start_pfn = 0;
 		zone->spanned_pages = size;
 		zone->present_pages = real_size;
+#if defined(CONFIG_MEMORY_HOTPLUG)
+		zone->present_early_pages = real_size;
+#endif
 
 		totalpages += size;
 		realtotalpages += real_size;
@@ -7388,6 +7401,8 @@ static void pgdat_init_kcompactd(struct pglist_data *pgdat) {}
 
 static void __meminit pgdat_init_internals(struct pglist_data *pgdat)
 {
+	int i;
+
 	pgdat_resize_init(pgdat);
 
 	pgdat_init_split_queue(pgdat);
@@ -7396,6 +7411,9 @@ static void __meminit pgdat_init_internals(struct pglist_data *pgdat)
 	init_waitqueue_head(&pgdat->kswapd_wait);
 	init_waitqueue_head(&pgdat->pfmemalloc_wait);
 
+	for (i = 0; i < NR_VMSCAN_THROTTLE; i++)
+		init_waitqueue_head(&pgdat->reclaim_wait[i]);
+
 	pgdat_page_ext_init(pgdat);
 	lruvec_init(&pgdat->__lruvec);
 }
@@ -7502,7 +7520,7 @@ static void __init free_area_init_core(struct pglist_data *pgdat)
 }
 
 #ifdef CONFIG_FLATMEM
-static void __ref alloc_node_mem_map(struct pglist_data *pgdat)
+static void __init alloc_node_mem_map(struct pglist_data *pgdat)
 {
 	unsigned long __maybe_unused start = 0;
 	unsigned long __maybe_unused offset = 0;
@@ -7526,8 +7544,8 @@ static void __ref alloc_node_mem_map(struct pglist_data *pgdat)
 		end = pgdat_end_pfn(pgdat);
 		end = ALIGN(end, MAX_ORDER_NR_PAGES);
 		size =  (end - start) * sizeof(struct page);
-		map = memblock_alloc_node(size, SMP_CACHE_BYTES,
-					  pgdat->node_id);
+		map = memmap_alloc(size, SMP_CACHE_BYTES, MEMBLOCK_LOW_LIMIT,
+				   pgdat->node_id, false);
 		if (!map)
 			panic("Failed to allocate %ld bytes for node %d memory map\n",
 			      size, pgdat->node_id);
@@ -7548,7 +7566,7 @@ static void __ref alloc_node_mem_map(struct pglist_data *pgdat)
 #endif
 }
 #else
-static void __ref alloc_node_mem_map(struct pglist_data *pgdat) { }
+static inline void alloc_node_mem_map(struct pglist_data *pgdat) { }
 #endif /* CONFIG_FLATMEM */
 
 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
@@ -8125,8 +8143,7 @@ unsigned long free_reserved_area(void *start, void *end, int poison, const char
 	}
 
 	if (pages && s)
-		pr_info("Freeing %s memory: %ldK\n",
-			s, pages << (PAGE_SHIFT - 10));
+		pr_info("Freeing %s memory: %ldK\n", s, K(pages));
 
 	return pages;
 }
@@ -8171,14 +8188,13 @@ void __init mem_init_print_info(void)
 		", %luK highmem"
 #endif
 		")\n",
-		nr_free_pages() << (PAGE_SHIFT - 10),
-		physpages << (PAGE_SHIFT - 10),
+		K(nr_free_pages()), K(physpages),
 		codesize >> 10, datasize >> 10, rosize >> 10,
 		(init_data_size + init_code_size) >> 10, bss_size >> 10,
-		(physpages - totalram_pages() - totalcma_pages) << (PAGE_SHIFT - 10),
-		totalcma_pages << (PAGE_SHIFT - 10)
+		K(physpages - totalram_pages() - totalcma_pages),
+		K(totalcma_pages)
 #ifdef	CONFIG_HIGHMEM
-		, totalhigh_pages() << (PAGE_SHIFT - 10)
+		, K(totalhigh_pages())
 #endif
 		);
 }
@@ -8451,7 +8467,7 @@ void setup_per_zone_wmarks(void)
  * 8192MB:	11584k
  * 16384MB:	16384k
  */
-int __meminit init_per_zone_wmark_min(void)
+void calculate_min_free_kbytes(void)
 {
 	unsigned long lowmem_kbytes;
 	int new_min_free_kbytes;
@@ -8459,16 +8475,17 @@ int __meminit init_per_zone_wmark_min(void)
 	lowmem_kbytes = nr_free_buffer_pages() * (PAGE_SIZE >> 10);
 	new_min_free_kbytes = int_sqrt(lowmem_kbytes * 16);
 
-	if (new_min_free_kbytes > user_min_free_kbytes) {
-		min_free_kbytes = new_min_free_kbytes;
-		if (min_free_kbytes < 128)
-			min_free_kbytes = 128;
-		if (min_free_kbytes > 262144)
-			min_free_kbytes = 262144;
-	} else {
+	if (new_min_free_kbytes > user_min_free_kbytes)
+		min_free_kbytes = clamp(new_min_free_kbytes, 128, 262144);
+	else
 		pr_warn("min_free_kbytes is not updated to %d because user defined value %d is preferred\n",
 				new_min_free_kbytes, user_min_free_kbytes);
-	}
+
+}
+
+int __meminit init_per_zone_wmark_min(void)
+{
+	calculate_min_free_kbytes();
 	setup_per_zone_wmarks();
 	refresh_zone_stat_thresholds();
 	setup_per_zone_lowmem_reserve();
@@ -8755,7 +8772,8 @@ void *__init alloc_large_system_hash(const char *tablename,
 		} else if (get_order(size) >= MAX_ORDER || hashdist) {
 			table = __vmalloc(size, gfp_flags);
 			virt = true;
-			huge = is_vm_area_hugepages(table);
+			if (table)
+				huge = is_vm_area_hugepages(table);
 		} else {
 			/*
 			 * If bucketsize is not a power-of-two, we may free
@@ -8815,9 +8833,6 @@ struct page *has_unmovable_pages(struct zone *zone, struct page *page,
 	}
 
 	for (; iter < pageblock_nr_pages - offset; iter++) {
-		if (!pfn_valid_within(pfn + iter))
-			continue;
-
 		page = pfn_to_page(pfn + iter);
 
 		/*
@@ -8977,7 +8992,7 @@ static int __alloc_contig_migrate_range(struct compact_control *cc,
 		cc->nr_migratepages -= nr_reclaimed;
 
 		ret = migrate_pages(&cc->migratepages, alloc_migration_target,
-				NULL, (unsigned long)&mtc, cc->mode, MR_CONTIG_RANGE);
+			NULL, (unsigned long)&mtc, cc->mode, MR_CONTIG_RANGE, NULL);
 
 		/*
 		 * On -ENOMEM, migrate_pages() bails out right away. It is pointless
@@ -9355,21 +9370,21 @@ void __offline_isolated_pages(unsigned long start_pfn, unsigned long end_pfn)
 }
 #endif
 
+/*
+ * This function returns a stable result only if called under zone lock.
+ */
 bool is_free_buddy_page(struct page *page)
 {
-	struct zone *zone = page_zone(page);
 	unsigned long pfn = page_to_pfn(page);
-	unsigned long flags;
 	unsigned int order;
 
-	spin_lock_irqsave(&zone->lock, flags);
 	for (order = 0; order < MAX_ORDER; order++) {
 		struct page *page_head = page - (pfn & ((1 << order) - 1));
 
-		if (PageBuddy(page_head) && buddy_order(page_head) >= order)
+		if (PageBuddy(page_head) &&
+		    buddy_order_unsafe(page_head) >= order)
 			break;
 	}
-	spin_unlock_irqrestore(&zone->lock, flags);
 
 	return order < MAX_ORDER;
 }