[PATCH 09/28] microblaze: introduce arch_zone_limits_init()

[Mike Rapoport <rppt@kernel.org>]

From: "Mike Rapoport (Microsoft)" <rppt@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@kernel.org>
---
 arch/microblaze/mm/init.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index 31d475cdb1c5..54da60b81094 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -54,6 +54,16 @@ static void __init highmem_init(void)
 }
 #endif /* CONFIG_HIGHMEM */
 
+void __init arch_zone_limits_init(unsigned long *max_zone_pfns)
+{
+#ifdef CONFIG_HIGHMEM
+	max_zone_pfns[ZONE_DMA] = max_low_pfn;
+	max_zone_pfns[ZONE_HIGHMEM] = max_pfn;
+#else
+	max_zone_pfns[ZONE_DMA] = max_pfn;
+#endif
+}
+
 /*
  * paging_init() sets up the page tables - in fact we've already done this.
  */
@@ -71,13 +81,8 @@ static void __init paging_init(void)
 
 #ifdef CONFIG_HIGHMEM
 	highmem_init();
-
-	zones_size[ZONE_DMA] = max_low_pfn;
-	zones_size[ZONE_HIGHMEM] = max_pfn;
-#else
-	zones_size[ZONE_DMA] = max_pfn;
 #endif
-
+	arch_zone_limits_init(zones_size);
 	/* We don't have holes in memory map */
 	free_area_init(zones_size);
 }
-- 
2.51.0