x86, mm: use add_highpages_with_active_regions() for high pages init v2

use early_node_map to init high pages, so we can remove page_is_ram() and
page_is_reserved_early() in the big loop with add_one_highpage

also remove page_is_reserved_early(), it is not needed anymore.

v2: fix the build of other platforms

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/mm/discontig_32.c

@@ -100,7 +100,6 @@ unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn,
 #endif
 
 extern unsigned long find_max_low_pfn(void);
-extern void add_one_highpage_init(struct page *, int, int);
 extern unsigned long highend_pfn, highstart_pfn;
 
 #define LARGE_PAGE_BYTES (PTRS_PER_PTE * PAGE_SIZE)
@@ -432,10 +431,10 @@ void __init set_highmem_pages_init(int bad_ppro)
 {
 #ifdef CONFIG_HIGHMEM
 	struct zone *zone;
-	struct page *page;
+	int nid;
 
 	for_each_zone(zone) {
-		unsigned long node_pfn, zone_start_pfn, zone_end_pfn;
+		unsigned long zone_start_pfn, zone_end_pfn;
 
 		if (!is_highmem(zone))
 			continue;
@@ -443,16 +442,12 @@ void __init set_highmem_pages_init(int bad_ppro)
 		zone_start_pfn = zone->zone_start_pfn;
 		zone_end_pfn = zone_start_pfn + zone->spanned_pages;
 
+		nid = zone_to_nid(zone);
 		printk("Initializing %s for node %d (%08lx:%08lx)\n",
-				zone->name, zone_to_nid(zone),
-				zone_start_pfn, zone_end_pfn);
+				zone->name, nid, zone_start_pfn, zone_end_pfn);
 
-		for (node_pfn = zone_start_pfn; node_pfn < zone_end_pfn; node_pfn++) {
-			if (!pfn_valid(node_pfn))
-				continue;
-			page = pfn_to_page(node_pfn);
-			add_one_highpage_init(page, node_pfn, bad_ppro);
-		}
+		add_highpages_with_active_regions(nid, zone_start_pfn,
+				 zone_end_pfn, bad_ppro);
 	}
 	totalram_pages += totalhigh_pages;
 #endif

arch/x86/mm/init_32.c

@@ -287,10 +287,10 @@ static void __init permanent_kmaps_init(pgd_t *pgd_base)
 	pkmap_page_table = pte;
 }
 
-void __init add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
+static void __init
+add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
 {
-	if (page_is_ram(pfn) && !(bad_ppro && page_kills_ppro(pfn)) &&
-	    !page_is_reserved_early(pfn)) {
+	if (!(bad_ppro && page_kills_ppro(pfn))) {
 		ClearPageReserved(page);
 		init_page_count(page);
 		__free_page(page);
@@ -299,18 +299,58 @@ void __init add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
 		SetPageReserved(page);
 }
 
+struct add_highpages_data {
+	unsigned long start_pfn;
+	unsigned long end_pfn;
+	int bad_ppro;
+};
+
+static void __init add_highpages_work_fn(unsigned long start_pfn,
+					 unsigned long end_pfn, void *datax)
+{
+	int node_pfn;
+	struct page *page;
+	unsigned long final_start_pfn, final_end_pfn;
+	struct add_highpages_data *data;
+	int bad_ppro;
+
+	data = (struct add_highpages_data *)datax;
+	bad_ppro = data->bad_ppro;
+
+	final_start_pfn = max(start_pfn, data->start_pfn);
+	final_end_pfn = min(end_pfn, data->end_pfn);
+	if (final_start_pfn >= final_end_pfn)
+		return;
+
+	for (node_pfn = final_start_pfn; node_pfn < final_end_pfn;
+	     node_pfn++) {
+		if (!pfn_valid(node_pfn))
+			continue;
+		page = pfn_to_page(node_pfn);
+		add_one_highpage_init(page, node_pfn, bad_ppro);
+	}
+
+}
+
+void __init add_highpages_with_active_regions(int nid, unsigned long start_pfn,
+					      unsigned long end_pfn,
+					      int bad_ppro)
+{
+	struct add_highpages_data data;
+
+	data.start_pfn = start_pfn;
+	data.end_pfn = end_pfn;
+	data.bad_ppro = bad_ppro;
+
+	work_with_active_regions(nid, add_highpages_work_fn, &data);
+}
+
 #ifndef CONFIG_NUMA
 static void __init set_highmem_pages_init(int bad_ppro)
 {
-	int pfn;
+	add_highpages_with_active_regions(0, highstart_pfn, highend_pfn,
+						bad_ppro);
 
-	for (pfn = highstart_pfn; pfn < highend_pfn; pfn++) {
-		/*
-		 * Holes under sparsemem might not have no mem_map[]:
-		 */
-		if (pfn_valid(pfn))
-			add_one_highpage_init(pfn_to_page(pfn), pfn, bad_ppro);
-	}
 	totalram_pages += totalhigh_pages;
 }
 #endif /* !CONFIG_NUMA */