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x86, mm: Use clamp_t() in init_range_memory_mapping

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save some lines, and make code more readable.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-42-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Yinghai Lu 2012-11-16 19:39:18 -08:00 committed by H. Peter Anvin
parent 60a8f42832
commit b8fd39c036
1 changed files with 5 additions and 16 deletions
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21
arch/x86/mm/init.c
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@ -357,31 +357,20 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
* would have hole in the middle or ends, and only ram parts will be mapped.
*/
static unsigned long __init init_range_memory_mapping(
unsigned long range_start,
unsigned long range_end)
unsigned long r_start,
unsigned long r_end)
{
unsigned long start_pfn, end_pfn;
unsigned long mapped_ram_size = 0;
int i;
for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, NULL) {
u64 start = (u64)start_pfn << PAGE_SHIFT;
u64 end = (u64)end_pfn << PAGE_SHIFT;
if (end <= range_start)
u64 start = clamp_val(PFN_PHYS(start_pfn), r_start, r_end);
u64 end = clamp_val(PFN_PHYS(end_pfn), r_start, r_end);
if (start >= end)
continue;
if (start < range_start)
start = range_start;
if (start >= range_end)
continue;
if (end > range_end)
end = range_end;
init_memory_mapping(start, end);
mapped_ram_size += end - start;
}