--- zzzz-none-000/linux-3.10.107/arch/sh/mm/init.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/sh/mm/init.c	2021-02-04 17:41:59.000000000 +0000
@@ -231,7 +231,7 @@
 	if (!p->node_spanned_pages)
 		return;
 
-	end_pfn = p->node_start_pfn + p->node_spanned_pages;
+	end_pfn = pgdat_end_pfn(p);
 
 	total_pages = bootmem_bootmap_pages(p->node_spanned_pages);
 
@@ -407,30 +407,16 @@
 
 void __init mem_init(void)
 {
-	int codesize, datasize, initsize;
-	int nid;
+	pg_data_t *pgdat;
 
 	iommu_init();
 
-	num_physpages = 0;
 	high_memory = NULL;
+	for_each_online_pgdat(pgdat)
+		high_memory = max_t(void *, high_memory,
+				    __va(pgdat_end_pfn(pgdat) << PAGE_SHIFT));
 
-	for_each_online_node(nid) {
-		pg_data_t *pgdat = NODE_DATA(nid);
-		void *node_high_memory;
-
-		num_physpages += pgdat->node_present_pages;
-
-		if (pgdat->node_spanned_pages)
-			totalram_pages += free_all_bootmem_node(pgdat);
-
-
-		node_high_memory = (void *)__va((pgdat->node_start_pfn +
-						 pgdat->node_spanned_pages) <<
-						 PAGE_SHIFT);
-		if (node_high_memory > high_memory)
-			high_memory = node_high_memory;
-	}
+	free_all_bootmem();
 
 	/* Set this up early, so we can take care of the zero page */
 	cpu_cache_init();
@@ -441,19 +427,8 @@
 
 	vsyscall_init();
 
-	codesize =  (unsigned long) &_etext - (unsigned long) &_text;
-	datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
-	initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
-
-	printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
-	       "%dk data, %dk init)\n",
-		nr_free_pages() << (PAGE_SHIFT-10),
-		num_physpages << (PAGE_SHIFT-10),
-		codesize >> 10,
-		datasize >> 10,
-		initsize >> 10);
-
-	printk(KERN_INFO "virtual kernel memory layout:\n"
+	mem_init_print_info(NULL);
+	pr_info("virtual kernel memory layout:\n"
 		"    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
 #ifdef CONFIG_HIGHMEM
 		"    pkmap   : 0x%08lx - 0x%08lx   (%4ld kB)\n"
@@ -499,29 +474,31 @@
 
 void free_initmem(void)
 {
-	free_initmem_default(0);
+	free_initmem_default(-1);
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, -1, "initrd");
 }
 #endif
 
 #ifdef CONFIG_MEMORY_HOTPLUG
-int arch_add_memory(int nid, u64 start, u64 size)
+int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
 {
 	pg_data_t *pgdat;
-	unsigned long start_pfn = start >> PAGE_SHIFT;
+	unsigned long start_pfn = PFN_DOWN(start);
 	unsigned long nr_pages = size >> PAGE_SHIFT;
 	int ret;
 
 	pgdat = NODE_DATA(nid);
 
 	/* We only have ZONE_NORMAL, so this is easy.. */
-	ret = __add_pages(nid, pgdat->node_zones + ZONE_NORMAL,
-				start_pfn, nr_pages);
+	ret = __add_pages(nid, pgdat->node_zones +
+			zone_for_memory(nid, start, size, ZONE_NORMAL,
+			for_device),
+			start_pfn, nr_pages);
 	if (unlikely(ret))
 		printk("%s: Failed, __add_pages() == %d\n", __func__, ret);
 
@@ -541,7 +518,7 @@
 #ifdef CONFIG_MEMORY_HOTREMOVE
 int arch_remove_memory(u64 start, u64 size)
 {
-	unsigned long start_pfn = start >> PAGE_SHIFT;
+	unsigned long start_pfn = PFN_DOWN(start);
 	unsigned long nr_pages = size >> PAGE_SHIFT;
 	struct zone *zone;
 	int ret;