[RFC PATCH v2, part4 11/39] mm/ARM64: prepare for removing num_physpages and simplify mem_init()
From: Jiang Liu <hidden>
Date: 2013-03-24 07:28:51
Also in:
linux-mm, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by: Jiang Liu <redacted> Cc: Russell King <redacted> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <redacted> Cc: linux-arm-kernel at lists.infradead.org Cc: linux-kernel at vger.kernel.org --- arch/arm64/mm/init.c | 48 +++--------------------------------------------- 1 file changed, 3 insertions(+), 45 deletions(-)
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 0f2cf5d..821e788 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
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1.7.9.5