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Subject[PATCH 38/46] x86, mm: use limit_pfn for end pfn
Date
instead of shifting end to get that.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
arch/x86/mm/init.c | 20 +++++++++++---------
1 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index e430f1e..a0f579a 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -199,10 +199,12 @@ 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
@@ -219,8 +221,8 @@ 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;
@@ -229,11 +231,11 @@ 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) {
@@ -245,7 +247,7 @@ 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 &
@@ -255,7 +257,7 @@ 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));
@@ -265,7 +267,7 @@ 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 */
--
1.7.7


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