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Subject[PATCH 36/46] x86, mm: use PFN_DOWN in split_mem_range()
Date
to replace own inline version for shifting.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
arch/x86/mm/init.c | 44 ++++++++++++++++++++++----------------------
1 files changed, 22 insertions(+), 22 deletions(-)

diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index ae3d642..a4fdf31 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -204,8 +204,8 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
int i;

/* head if not big page alignment ? */
- start_pfn = start >> PAGE_SHIFT;
- pos = start_pfn << PAGE_SHIFT;
+ start_pfn = PFN_DOWN(start);
+ pos = PFN_PHYS(start_pfn);
#ifdef CONFIG_X86_32
/*
* Don't use a large page for the first 2/4MB of memory
@@ -214,59 +214,59 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
* slowdowns.
*/
if (pos == 0)
- end_pfn = PMD_SIZE >> PAGE_SHIFT;
+ end_pfn = PFN_DOWN(PMD_SIZE);
else
- end_pfn = round_up(pos, PMD_SIZE) >> PAGE_SHIFT;
+ end_pfn = PFN_DOWN(round_up(pos, PMD_SIZE));
#else /* CONFIG_X86_64 */
- end_pfn = round_up(pos, PMD_SIZE) >> PAGE_SHIFT;
+ end_pfn = PFN_DOWN(round_up(pos, PMD_SIZE));
#endif
- if (end_pfn > (end >> PAGE_SHIFT))
- end_pfn = end >> PAGE_SHIFT;
+ if (end_pfn > PFN_DOWN(end))
+ end_pfn = PFN_DOWN(end);
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
- pos = end_pfn << PAGE_SHIFT;
+ pos = PFN_PHYS(end_pfn);
}

/* big page (2M) range */
- start_pfn = round_up(pos, PMD_SIZE) >> PAGE_SHIFT;
+ start_pfn = PFN_DOWN(round_up(pos, PMD_SIZE));
#ifdef CONFIG_X86_32
- end_pfn = round_down(end, PMD_SIZE) >> PAGE_SHIFT;
+ end_pfn = PFN_DOWN(round_down(end, PMD_SIZE));
#else /* CONFIG_X86_64 */
- end_pfn = round_up(pos, PUD_SIZE) >> PAGE_SHIFT;
- if (end_pfn > (round_down(end, PMD_SIZE) >> PAGE_SHIFT))
- end_pfn = round_down(end, PMD_SIZE) >> PAGE_SHIFT;
+ end_pfn = PFN_DOWN(round_up(pos, PUD_SIZE));
+ if (end_pfn > PFN_DOWN(round_down(end, PMD_SIZE)))
+ end_pfn = PFN_DOWN(round_down(end, PMD_SIZE));
#endif

if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
page_size_mask & (1<<PG_LEVEL_2M));
- pos = end_pfn << PAGE_SHIFT;
+ pos = PFN_PHYS(end_pfn);
}

#ifdef CONFIG_X86_64
/* big page (1G) range */
- start_pfn = round_up(pos, PUD_SIZE) >> PAGE_SHIFT;
- end_pfn = round_down(end, PUD_SIZE) >> PAGE_SHIFT;
+ start_pfn = PFN_DOWN(round_up(pos, PUD_SIZE));
+ end_pfn = PFN_DOWN(round_down(end, PUD_SIZE));
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
page_size_mask &
((1<<PG_LEVEL_2M)|(1<<PG_LEVEL_1G)));
- pos = end_pfn << PAGE_SHIFT;
+ pos = PFN_PHYS(end_pfn);
}

/* tail is not big page (1G) alignment */
- start_pfn = round_up(pos, PMD_SIZE) >> PAGE_SHIFT;
- end_pfn = round_down(end, PMD_SIZE) >> PAGE_SHIFT;
+ start_pfn = PFN_DOWN(round_up(pos, PMD_SIZE));
+ end_pfn = PFN_DOWN(round_down(end, 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));
- pos = end_pfn << PAGE_SHIFT;
+ pos = PFN_PHYS(end_pfn);
}
#endif

/* tail is not big page (2M) alignment */
- start_pfn = pos>>PAGE_SHIFT;
- end_pfn = end>>PAGE_SHIFT;
+ start_pfn = PFN_DOWN(pos);
+ end_pfn = PFN_DOWN(end);
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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