mm/ppc: prepare for removing num_physpages and simplify mem_init()

Prepare for removing num_physpages and simplify mem_init().

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 12 insertions, 44 deletions

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 3bcfc0d0d322..49c18b60bbb4 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -299,46 +299,27 @@ void __init paging_init(void)
 
 void __init mem_init(void)
 {
-#ifdef CONFIG_NEED_MULTIPLE_NODES
-        int nid;
-#endif
-        pg_data_t *pgdat;
-        unsigned long i;
-        struct page *page;
-        unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize;
-
 #ifdef CONFIG_SWIOTLB
         swiotlb_init(0);
 #endif
 
-        num_physpages = memblock_phys_mem_size() >> PAGE_SHIFT;
         high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
 
 #ifdef CONFIG_NEED_MULTIPLE_NODES
-        for_each_online_node(nid) {
-                if (NODE_DATA(nid)->node_spanned_pages != 0) {
-                        printk("freeing bootmem node %d\n", nid);
-                        free_all_bootmem_node(NODE_DATA(nid));
-                }
+        {
+                pg_data_t *pgdat;
+
+                for_each_online_pgdat(pgdat)
+                        if (pgdat->node_spanned_pages != 0) {
+                                printk("freeing bootmem node %d\n",
+                                        pgdat->node_id);
+                                free_all_bootmem_node(pgdat);
+                        }
         }
 #else
         max_mapnr = max_pfn;
         free_all_bootmem();
 #endif
-        for_each_online_pgdat(pgdat) {
-                for (i = 0; i < pgdat->node_spanned_pages; i++) {
-                        if (!pfn_valid(pgdat->node_start_pfn + i))
-                                continue;
-                        page = pgdat_page_nr(pgdat, i);
-                        if (PageReserved(page))
-                                reservedpages++;
-                }
-        }
-
-        codesize = (unsigned long)&_sdata - (unsigned long)&_stext;
-        datasize = (unsigned long)&_edata - (unsigned long)&_sdata;
-        initsize = (unsigned long)&__init_end - (unsigned long)&__init_begin;
-        bsssize = (unsigned long)&__bss_stop - (unsigned long)&__bss_start;
 
 #ifdef CONFIG_HIGHMEM
         {
@@ -348,13 +329,9 @@ void __init mem_init(void)
                 for (pfn = highmem_mapnr; pfn < max_mapnr; ++pfn) {
                         phys_addr_t paddr = (phys_addr_t)pfn << PAGE_SHIFT;
                         struct page *page = pfn_to_page(pfn);
-                        if (memblock_is_reserved(paddr))
-                                continue;
-                        free_highmem_page(page);
-                        reservedpages--;
+                        if (!memblock_is_reserved(paddr))
+                                free_highmem_page(page);
                 }
-                printk(KERN_DEBUG "High memory: %luk\n",
-                       totalhigh_pages << (PAGE_SHIFT-10));
         }
 #endif /* CONFIG_HIGHMEM */
 
@@ -367,16 +344,7 @@ void __init mem_init(void)
                 (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1;
 #endif
 
-        printk(KERN_INFO "Memory: %luk/%luk available (%luk kernel code, "
-               "%luk reserved, %luk data, %luk bss, %luk init)\n",
-                nr_free_pages() << (PAGE_SHIFT-10),
-                num_physpages << (PAGE_SHIFT-10),
-                codesize >> 10,
-                reservedpages << (PAGE_SHIFT-10),
-                datasize >> 10,
-                bsssize >> 10,
-                initsize >> 10);
-
+        mem_init_print_info(NULL);
 #ifdef CONFIG_PPC32
         pr_info("Kernel virtual memory layout:\n");
         pr_info("  * 0x%08lx..0x%08lx  : fixmap\n", FIXADDR_START, FIXADDR_TOP);