mm/ARM64: 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: Russell King <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 45 deletions

diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 93de98afedd7..b16c778ea0de 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -272,59 +272,17 @@ static void __init free_unused_memmap(void)
  */
 void __init mem_init(void)
 {
-        unsigned long reserved_pages, free_pages;
-        struct memblock_region *reg;
-
         arm64_swiotlb_init();
 
         max_mapnr   = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
 
 #ifndef CONFIG_SPARSEMEM_VMEMMAP
-        /* this will put all unused low memory onto the freelists */
         free_unused_memmap();
 #endif
-
+        /* this will put all unused low memory onto the freelists */
         free_all_bootmem();
 
-        reserved_pages = free_pages = 0;
-
-        for_each_memblock(memory, reg) {
-                unsigned int pfn1, pfn2;
-                struct page *page, *end;
-
-                pfn1 = __phys_to_pfn(reg->base);
-                pfn2 = pfn1 + __phys_to_pfn(reg->size);
-
-                page = pfn_to_page(pfn1);
-                end  = pfn_to_page(pfn2 - 1) + 1;
-
-                do {
-                        if (PageReserved(page))
-                                reserved_pages++;
-                        else if (!page_count(page))
-                                free_pages++;
-                        page++;
-                } while (page < end);
-        }
-
-        /*
-         * Since our memory may not be contiguous, calculate the real number
-         * of pages we have in this system.
-         */
-        pr_info("Memory:");
-        num_physpages = 0;
-        for_each_memblock(memory, reg) {
-                unsigned long pages = memblock_region_memory_end_pfn(reg) -
-                        memblock_region_memory_base_pfn(reg);
-                num_physpages += pages;
-                printk(" %ldMB", pages >> (20 - PAGE_SHIFT));
-        }
-        printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));
-
-        pr_notice("Memory: %luk/%luk available, %luk reserved\n",
-                  nr_free_pages() << (PAGE_SHIFT-10),
-                  free_pages << (PAGE_SHIFT-10),
-                  reserved_pages << (PAGE_SHIFT-10));
+        mem_init_print_info();
 
 #define MLK(b, t) b, t, ((t) - (b)) >> 10
 #define MLM(b, t) b, t, ((t) - (b)) >> 20
@@ -366,7 +324,7 @@ void __init mem_init(void)
         BUILD_BUG_ON(TASK_SIZE_64                       > MODULES_VADDR);
         BUG_ON(TASK_SIZE_64                             > MODULES_VADDR);
 
-        if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
+        if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) {
                 extern int sysctl_overcommit_memory;
                 /*
                  * On a machine this small we won't get anywhere without