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Commit 3a669411 authored by Russell King's avatar Russell King
Browse files

[PATCH] ARM: Ensure memory information is page aligned 



Ensure that meminfo.bank[] array contains page-aligned start/size
information.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent b46a58fd

arch/arm/kernel/setup.c

+16 −9
Original line number Diff line number Diff line
@@ -395,6 +395,20 @@ static void __init early_initrd(char **p) 
}

__early_param("initrd=", early_initrd);



static void __init add_memory(unsigned long start, unsigned long size)

{

	/*

	 * Ensure that start/size are aligned to a page boundary.

	 * Size is appropriately rounded down, start is rounded up.

	 */

	size -= start & ~PAGE_MASK;



	meminfo.bank[meminfo.nr_banks].start = PAGE_ALIGN(start);

	meminfo.bank[meminfo.nr_banks].size  = size & PAGE_MASK;

	meminfo.bank[meminfo.nr_banks].node  = PHYS_TO_NID(start);

	meminfo.nr_banks += 1;

}



/*

 * Pick out the memory size.  We look for mem=size@start,

 * where start and size are "size[KkMm]"
@@ -419,10 +433,7 @@ static void __init early_mem(char **p) 
	if (**p == '@')

		start = memparse(*p + 1, p);



	meminfo.bank[meminfo.nr_banks].start = start;

	meminfo.bank[meminfo.nr_banks].size  = size;

	meminfo.bank[meminfo.nr_banks].node  = PHYS_TO_NID(start);

	meminfo.nr_banks += 1;

	add_memory(start, size);

}

__early_param("mem=", early_mem);
@@ -564,11 +575,7 @@ static int __init parse_tag_mem32(const struct tag *tag) 
			tag->u.mem.start, tag->u.mem.size / 1024);

		return -EINVAL;

	}

	meminfo.bank[meminfo.nr_banks].start = tag->u.mem.start;

	meminfo.bank[meminfo.nr_banks].size  = tag->u.mem.size;

	meminfo.bank[meminfo.nr_banks].node  = PHYS_TO_NID(tag->u.mem.start);

	meminfo.nr_banks += 1;



	add_memory(tag->u.mem.start, tag->u.mem.size);

	return 0;

}