x86: merge zones_sizes_init for numa and non numa on 32-bit

move out e820_register_active_regions from non numa zones_sizes_init()
and remove numa version zones_sizes_init().

and let 32 bit call remove_all_active_ranges() in setup_arch() directly
like 64-bit
Signed-off-by: NYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/setup.c

@@ -749,10 +749,8 @@ void __init setup_arch(char **cmdline_p)
 	 */
 	acpi_boot_table_init();
 
-#ifdef CONFIG_X86_64
 	/* Remove active ranges so rediscovery with NUMA-awareness happens */
 	remove_all_active_ranges();
-#endif
 
 #ifdef CONFIG_ACPI_NUMA
 	/*

arch/x86/mm/discontig_32.c

@@ -327,7 +327,6 @@ void __init initmem_init(unsigned long start_pfn,
 	 * and ZONE_HIGHMEM.
 	 */
 
-	remove_all_active_ranges();
 	get_memcfg_numa();
 
 	kva_pages = round_up(calculate_numa_remap_pages(), PTRS_PER_PTE);
@@ -390,21 +389,6 @@ void __init initmem_init(unsigned long start_pfn,
 	setup_bootmem_allocator();
 }
 
-void __init zone_sizes_init(void)
-{
-	unsigned long max_zone_pfns[MAX_NR_ZONES];
-	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
-	max_zone_pfns[ZONE_DMA] =
-		virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
-	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
-#ifdef CONFIG_HIGHMEM
-	max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
-#endif
-
-	free_area_init_nodes(max_zone_pfns);
-	return;
-}
-
 void __init set_highmem_pages_init(void)
 {
 #ifdef CONFIG_HIGHMEM

arch/x86/mm/init_32.c

@@ -660,12 +660,14 @@ void __init initmem_init(unsigned long start_pfn,
 	if (max_pfn > max_low_pfn)
 		highstart_pfn = max_low_pfn;
 	memory_present(0, 0, highend_pfn);
+	e820_register_active_regions(0, 0, highend_pfn);
 	printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
 		pages_to_mb(highend_pfn - highstart_pfn));
 	num_physpages = highend_pfn;
 	high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
 #else
 	memory_present(0, 0, max_low_pfn);
+	e820_register_active_regions(0, 0, max_low_pfn);
 	num_physpages = max_low_pfn;
 	high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
 #endif
@@ -677,25 +679,21 @@ void __init initmem_init(unsigned long start_pfn,
 
 	setup_bootmem_allocator();
 }
+#endif /* !CONFIG_NEED_MULTIPLE_NODES */
 
-void __init zone_sizes_init(void)
+static void __init zone_sizes_init(void)
 {
 	unsigned long max_zone_pfns[MAX_NR_ZONES];
 	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 	max_zone_pfns[ZONE_DMA] =
 		virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
 	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
-	remove_all_active_ranges();
 #ifdef CONFIG_HIGHMEM
 	max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
-	e820_register_active_regions(0, 0, highend_pfn);
-#else
-	e820_register_active_regions(0, 0, max_low_pfn);
 #endif
 
 	free_area_init_nodes(max_zone_pfns);
 }
-#endif /* !CONFIG_NEED_MULTIPLE_NODES */
 
 void __init setup_bootmem_allocator(void)
 {

include/asm-x86/page_32.h

@@ -96,7 +96,6 @@ extern void find_low_pfn_range(void);
 extern unsigned long init_memory_mapping(unsigned long start,
 					 unsigned long end);
 extern void initmem_init(unsigned long, unsigned long);
-extern void zone_sizes_init(void);
 extern void setup_bootmem_allocator(void);