[PATCH v2 17/28] sh: introduce arch_zone_limits_init()

[Mike Rapoport]

From: "Mike Rapoport (Microsoft)" <rppt at kernel.org>

Move calculations of zone limits to a dedicated arch_zone_limits_init()
function.

Later MM core will use this function as an architecture specific callback
during nodes and zones initialization and thus there won't be a need to
call free_area_init() from every architecture.

Signed-off-by: Mike Rapoport (Microsoft) <rppt at kernel.org>
---
 arch/sh/mm/init.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 99e302eeeec1..5e7e63642611 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -264,6 +264,11 @@ static void __init early_reserve_mem(void)
 	reserve_crashkernel();
 }
 
+void __init arch_zone_limits_init(unsigned long *max_zone_pfns)
+{
+	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+}
+
 void __init paging_init(void)
 {
 	unsigned long max_zone_pfns[MAX_NR_ZONES];
@@ -322,7 +327,7 @@ void __init paging_init(void)
 	kmap_coherent_init();
 
 	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
-	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+	arch_zone_limits_init(max_zone_pfns);
 	free_area_init(max_zone_pfns);
 }
 
-- 
2.51.0