On Wed, 2013-05-08 at 23:51 +0800, Jiang Liu wrote: > Prepare for removing num_physpages and simplify mem_init(). No objection, I haven't had a chance to actually build/boot test though. BTW. A recommended way of doing so which is pretty easy even if you don't have access to powerpc hardware nowadays is to use qemu-system-ppc64 with -M pseries. You can find cross compilers for the kernel on kernel.org and you can feed qemu with some distro installer ISO. Cheers, Ben. > Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx> > Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> > Cc: Paul Mackerras <paulus@xxxxxxxxx> > Cc: linuxppc-dev@xxxxxxxxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx > --- > arch/powerpc/mm/mem.c | 56 +++++++++++-------------------------------------- > 1 file changed, 12 insertions(+), 44 deletions(-) > > diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c > index b890245..4e24f1c 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); -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>