AcoSail/kernel_optimize_test
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[PATCH] ARM: Ensure memory information is page aligned

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

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2005-06-22 21:43:10 +01:00
parent b46a58fd4e
commit 3a66941106
1 changed files with 16 additions and 9 deletions
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25
arch/arm/kernel/setup.c
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@ -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;
}