[PATCH v2 7/9] mm: Calc the right pfn if page size is not 4K

[Wupeng Ma <mawupeng1@xxxxxxxxxx>]

From: Ma Wupeng <mawupeng1@xxxxxxxxxx>

Previous 0x100000 is used to check the 4G limit in
find_zone_movable_pfns_for_nodes(). This is right in x86 because
the page size can only be 4K. But 16K and 64K are available in
arm64. So replace it with PHYS_PFN(SZ_4G).

Signed-off-by: Ma Wupeng <mawupeng1@xxxxxxxxxx>
---
 mm/page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6e5b4488a0c5..570d0ebf98df 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7870,7 +7870,7 @@ static void __init find_zone_movable_pfns_for_nodes(void)
 
 			usable_startpfn = memblock_region_memory_base_pfn(r);
 
-			if (usable_startpfn < 0x100000) {
+			if (usable_startpfn < PHYS_PFN(SZ_4G)) {
 				mem_below_4gb_not_mirrored = true;
 				continue;
 			}
-- 
2.18.0.huawei.25