mm/frv: 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: David Howells <dhowells@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 21 insertions, 41 deletions

diff --git a/arch/frv/kernel/setup.c b/arch/frv/kernel/setup.c
index a5136474c6fd..f78f8cb44093 100644
--- a/arch/frv/kernel/setup.c
+++ b/arch/frv/kernel/setup.c
@@ -876,6 +876,7 @@ late_initcall(setup_arch_serial);
 static void __init setup_linux_memory(void)
 {
         unsigned long bootmap_size, low_top_pfn, kstart, kend, high_mem;
+        unsigned long physpages;
 
         kstart  = (unsigned long) &__kernel_image_start - PAGE_OFFSET;
         kend    = (unsigned long) &__kernel_image_end - PAGE_OFFSET;
@@ -893,19 +894,19 @@ static void __init setup_linux_memory(void)
                                          );
 
         /* pass the memory that the kernel can immediately use over to the bootmem allocator */
-        max_mapnr = num_physpages = (memory_end - memory_start) >> PAGE_SHIFT;
+        max_mapnr = physpages = (memory_end - memory_start) >> PAGE_SHIFT;
         low_top_pfn = (KERNEL_LOWMEM_END - KERNEL_LOWMEM_START) >> PAGE_SHIFT;
         high_mem = 0;
 
-        if (num_physpages > low_top_pfn) {
+        if (physpages > low_top_pfn) {
 #ifdef CONFIG_HIGHMEM
-                high_mem = num_physpages - low_top_pfn;
+                high_mem = physpages - low_top_pfn;
 #else
-                max_mapnr = num_physpages = low_top_pfn;
+                max_mapnr = physpages = low_top_pfn;
 #endif
         }
         else {
-                low_top_pfn = num_physpages;
+                low_top_pfn = physpages;
         }
 
         min_low_pfn = memory_start >> PAGE_SHIFT;
@@ -979,7 +980,7 @@ static void __init setup_uclinux_memory(void)
         free_bootmem(memory_start, memory_end - memory_start);
 
         high_memory = (void *) (memory_end & PAGE_MASK);
-        max_mapnr = num_physpages = ((unsigned long) high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
+        max_mapnr = ((unsigned long) high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
 
         min_low_pfn = memory_start >> PAGE_SHIFT;
         max_low_pfn = memory_end >> PAGE_SHIFT;
diff --git a/arch/frv/mm/init.c b/arch/frv/mm/init.c
index 3dcc88803a4f..88a159743528 100644
--- a/arch/frv/mm/init.c
+++ b/arch/frv/mm/init.c
@@ -78,7 +78,7 @@ void __init paging_init(void)
         memset((void *) empty_zero_page, 0, PAGE_SIZE);
 
 #ifdef CONFIG_HIGHMEM
-        if (num_physpages - num_mappedpages) {
+        if (get_num_physpages() - num_mappedpages) {
                 pgd_t *pge;
                 pud_t *pue;
                 pmd_t *pme;
@@ -96,7 +96,7 @@ void __init paging_init(void)
          */
         zones_size[ZONE_NORMAL]  = max_low_pfn - min_low_pfn;
 #ifdef CONFIG_HIGHMEM
-        zones_size[ZONE_HIGHMEM] = num_physpages - num_mappedpages;
+        zones_size[ZONE_HIGHMEM] = get_num_physpages() - num_mappedpages;
 #endif
 
         free_area_init(zones_size);
@@ -114,45 +114,24 @@ void __init paging_init(void)
  */
 void __init mem_init(void)
 {
-        unsigned long npages = (memory_end - memory_start) >> PAGE_SHIFT;
-        unsigned long tmp;
-#ifdef CONFIG_MMU
-        unsigned long loop, pfn;
-        int datapages = 0;
-#endif
-        int codek = 0, datak = 0;
+        unsigned long code_size = _etext - _stext;
 
         /* this will put all low memory onto the freelists */
         free_all_bootmem();
+#if defined(CONFIG_MMU) && defined(CONFIG_HIGHMEM)
+        {
+                unsigned long pfn;
 
-#ifdef CONFIG_MMU
-        for (loop = 0 ; loop < npages ; loop++)
-                if (PageReserved(&mem_map[loop]))
-                        datapages++;
-
-#ifdef CONFIG_HIGHMEM
-        for (pfn = num_physpages - 1; pfn >= num_mappedpages; pfn--)
-                free_highmem_page(&mem_map[pfn]);
-#endif
-
-        codek = ((unsigned long) &_etext - (unsigned long) &_stext) >> 10;
-        datak = datapages << (PAGE_SHIFT - 10);
-
-#else
-        codek = (_etext - _stext) >> 10;
-        datak = 0; //(__bss_stop - _sdata) >> 10;
+                for (pfn = get_num_physpages() - 1;
+                     pfn >= num_mappedpages; pfn--)
+                        free_highmem_page(&mem_map[pfn]);
+        }
 #endif
 
-        tmp = nr_free_pages() << PAGE_SHIFT;
-        printk("Memory available: %luKiB/%luKiB RAM, %luKiB/%luKiB ROM (%dKiB kernel code, %dKiB data)\n",
-               tmp >> 10,
-               npages << (PAGE_SHIFT - 10),
-               (rom_length > 0) ? ((rom_length >> 10) - codek) : 0,
-               rom_length >> 10,
-               codek,
-               datak
-               );
-
+        mem_init_print_info(NULL);
+        if (rom_length > 0 && rom_length >= code_size)
+                printk("Memory available:  %luKiB/%luKiB ROM\n",
+                        (rom_length - code_size) >> 10, rom_length >> 10);
 } /* end mem_init() */
 
 /*****************************************************************************/