[RFC PATCH v2, part4 23/39] mm/microblaze: prepare for removing num_physpages and simplify mem_init()

Jiang Liu
2013-03-24T07:31:49Z

Cc: Michal Simek <monstr@monstr.eu>
Cc: microblaze-uclinux@itee.uq.edu.au
Cc: linux-kernel@vger.kernel.org
---
arch/microblaze/mm/init.c | 51 ++++++---------------------------------------
1 file changed, 6 insertions(+), 45 deletions(-)

diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index 3a434fd..0545ecd 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -71,24 +71,17 @@ static void __init highmem_init(void)
kmap_prot = PAGE_KERNEL;
}

-static unsigned long highmem_setup(void)
+static void highmem_setup(void)
{
unsigned long pfn;
- unsigned long reservedpages = 0;

for (pfn = max_low_pfn; pfn < max_pfn; ++pfn) {
struct page *page = pfn_to_page(pfn);

/* FIXME not sure about */
- if (memblock_is_reserved(pfn << PAGE_SHIFT))
- continue;
- free_highmem_page(page);
- reservedpages++;
+ if (!memblock_is_reserved(pfn << PAGE_SHIFT))
+ free_highmem_page(page);
}
- printk(KERN_INFO "High memory: %luk\n",
- totalhigh_pages << (PAGE_SHIFT-10));
-
- return reservedpages;
}
#endif /* CONFIG_HIGHMEM */

@@ -167,13 +160,12 @@ void __init setup_memory(void)
* min_low_pfn - the first page (mm/bootmem.c - node_boot_start)
* max_low_pfn
* max_mapnr - the first unused page (mm/bootmem.c - node_low_pfn)
- * num_physpages - number of all pages
*/

/* memory start is from the kernel end (aligned) to higher addr */
min_low_pfn = memory_start >> PAGE_SHIFT; /* minimum for allocation */
/* RAM is assumed contiguous */
- num_physpages = max_mapnr = memory_size >> PAGE_SHIFT;
+ max_mapnr = memory_size >> PAGE_SHIFT;
max_low_pfn = ((u64)memory_start + (u64)lowmem_size) >> PAGE_SHIFT;
max_pfn = ((u64)memory_start + (u64)memory_size) >> PAGE_SHIFT;

@@ -246,46 +238,15 @@ void free_initmem(void)

void __init mem_init(void)
{
- pg_data_t *pgdat;
- unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize;
-
high_memory = (void *)__va(memory_start + lowmem_size - 1);

/* this will put all memory onto the freelists */
free_all_bootmem();
-
- for_each_online_pgdat(pgdat) {
- unsigned long i;
- struct page *page;
-
- 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++;
- }
- }
-
#ifdef CONFIG_HIGHMEM
- reservedpages -= highmem_setup();
+ highmem_setup();
#endif

- 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;
-
- pr_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(str);
#ifdef CONFIG_MMU
pr_info("Kernel virtual memory layout:\n");
pr_info(" * 0x%08lx..0x%08lx : fixmap\n", FIXADDR_START, FIXADDR_TOP);
--
1.7.9.5