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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>
This commit is contained in:
Jiang Liu 2013-07-03 15:03:55 -07:00 committed by Linus Torvalds
parent 4e422de996
commit 3f2b73c3c3
2 changed files with 21 additions and 41 deletions
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13
arch/frv/kernel/setup.c
View File

@ -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;

49
arch/frv/mm/init.c
View File

@ -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]);
for (pfn = get_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;
#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() */
/*****************************************************************************/