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Commit 1fb57187 authored by Jiang Liu's avatar Jiang Liu Committed by Laura Abbott
Browse files

mm/ARM: prepare for removing num_physpages and simplify mem_init() 



Prepare for removing num_physpages and simplify mem_init().

Change-Id: I7f5733603657227ec80498414959316f90e3e238
Signed-off-by: default avatarJiang Liu <jiang.liu@huawei.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Git-commit: 2450c97323e635a04f7b2f4b68680ab2c151bbbf
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: default avatarLaura Abbott <lauraa@codeaurora.org>
parent 42e668f4

arch/arm/mm/init.c

+2 −52
Original line number Diff line number Diff line
@@ -694,9 +694,6 @@ static void print_vmalloc_lowmem_info(void) 
 */

void __init mem_init(void)

{

	unsigned long reserved_pages, free_pages;

	struct memblock_region *reg;

	int i;

#ifdef CONFIG_HAVE_TCM

	/* These pointers are filled in on TCM detection */

	extern u32 dtcm_end;
@@ -716,54 +713,7 @@ void __init mem_init(void) 


	free_highpages();



	reserved_pages = free_pages = 0;



	for_each_bank(i, &meminfo) {

		struct membank *bank = &meminfo.bank[i];

		unsigned int pfn1, pfn2;

		struct page *page, *end;



		pfn1 = bank_pfn_start(bank);

		pfn2 = bank_pfn_end(bank);



		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++;

#ifdef CONFIG_SPARSEMEM

			pfn1++;

			if (!(pfn1 % PAGES_PER_SECTION))

				page = pfn_to_page(pfn1);

		} while (pfn1 < pfn2);

#else

		} while (page < end);

#endif

	}



	/*

	 * Since our memory may not be contiguous, calculate the

	 * real number of pages we have in this system

	 */

	printk(KERN_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));



	printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n",

		nr_free_pages() << (PAGE_SHIFT-10),

		free_pages << (PAGE_SHIFT-10),

		reserved_pages << (PAGE_SHIFT-10),

		totalhigh_pages << (PAGE_SHIFT-10));

	mem_init_print_info(NULL);



	printk(KERN_NOTICE "Virtual kernel memory layout:\n"

			"    vector  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
@@ -826,7 +776,7 @@ void __init mem_init(void) 
	BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE	> PAGE_OFFSET);

#endif



	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