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x86, mm: use limit_pfn for end pfn

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instead of shifting end to get that.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-39-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 19:39:15 -08:00 committed by H. Peter Anvin
parent 1829ae9ad7
commit 2e8059edb6
1 changed files with 11 additions and 9 deletions
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20
arch/x86/mm/init.c
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@ -203,10 +203,12 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
unsigned long start,
unsigned long end)
{
unsigned long start_pfn, end_pfn;
unsigned long start_pfn, end_pfn, limit_pfn;
unsigned long pfn;
int i;
limit_pfn = PFN_DOWN(end);
/* head if not big page alignment ? */
pfn = start_pfn = PFN_DOWN(start);
#ifdef CONFIG_X86_32
@ -223,8 +225,8 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
#else /* CONFIG_X86_64 */
end_pfn = round_up(pfn, PFN_DOWN(PMD_SIZE));
#endif
if (end_pfn > PFN_DOWN(end))
end_pfn = PFN_DOWN(end);
if (end_pfn > limit_pfn)
end_pfn = limit_pfn;
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
pfn = end_pfn;
@ -233,11 +235,11 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
/* big page (2M) range */
start_pfn = round_up(pfn, PFN_DOWN(PMD_SIZE));
#ifdef CONFIG_X86_32
end_pfn = PFN_DOWN(round_down(end, PMD_SIZE));
end_pfn = round_down(limit_pfn, PFN_DOWN(PMD_SIZE));
#else /* CONFIG_X86_64 */
end_pfn = round_up(pfn, PFN_DOWN(PUD_SIZE));
if (end_pfn > PFN_DOWN(round_down(end, PMD_SIZE)))
end_pfn = PFN_DOWN(round_down(end, PMD_SIZE));
if (end_pfn > round_down(limit_pfn, PFN_DOWN(PMD_SIZE)))
end_pfn = round_down(limit_pfn, PFN_DOWN(PMD_SIZE));
#endif
if (start_pfn < end_pfn) {
@ -249,7 +251,7 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
#ifdef CONFIG_X86_64
/* big page (1G) range */
start_pfn = round_up(pfn, PFN_DOWN(PUD_SIZE));
end_pfn = PFN_DOWN(round_down(end, PUD_SIZE));
end_pfn = round_down(limit_pfn, PFN_DOWN(PUD_SIZE));
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
page_size_mask &
@ -259,7 +261,7 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
/* tail is not big page (1G) alignment */
start_pfn = round_up(pfn, PFN_DOWN(PMD_SIZE));
end_pfn = PFN_DOWN(round_down(end, PMD_SIZE));
end_pfn = round_down(limit_pfn, PFN_DOWN(PMD_SIZE));
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
page_size_mask & (1<<PG_LEVEL_2M));
@ -269,7 +271,7 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
/* tail is not big page (2M) alignment */
start_pfn = pfn;
end_pfn = PFN_DOWN(end);
end_pfn = limit_pfn;
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
/* try to merge same page size and continuous */