[PATCH v3 07/29] hexagon: introduce arch_zone_limits_init()

From: "Mike Rapoport (Microsoft)" <[email protected]>

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) <[email protected]>
---
 arch/hexagon/mm/init.c | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/arch/hexagon/mm/init.c b/arch/hexagon/mm/init.c
index 34eb9d424b96..e2c9487d8d34 100644
--- a/arch/hexagon/mm/init.c
+++ b/arch/hexagon/mm/init.c
@@ -54,6 +54,18 @@ void sync_icache_dcache(pte_t pte)
 	__vmcache_idsync(addr, PAGE_SIZE);
 }
 
+void __init arch_zone_limits_init(unsigned long *max_zone_pfns)
+{
+	/*
+	 *  This is not particularly well documented anywhere, but
+	 *  give ZONE_NORMAL all the memory, including the big holes
+	 *  left by the kernel+bootmem_map which are already left as reserved
+	 *  in the bootmem_map; free_area_init should see those bits and
+	 *  adjust accordingly.
+	 */
+	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+}
+
 /*
  * In order to set up page allocator "nodes",
  * somebody has to call free_area_init() for UMA.
@@ -65,16 +77,7 @@ static void __init paging_init(void)
 {
 	unsigned long max_zone_pfn[MAX_NR_ZONES] = {0, };
 
-	/*
-	 *  This is not particularly well documented anywhere, but
-	 *  give ZONE_NORMAL all the memory, including the big holes
-	 *  left by the kernel+bootmem_map which are already left as reserved
-	 *  in the bootmem_map; free_area_init should see those bits and
-	 *  adjust accordingly.
-	 */
-
-	max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
-
+	arch_zone_limits_init(max_zone_pfn);
 	free_area_init(max_zone_pfn);  /*  sets up the zonelists and mem_map  */
 
 	/*
-- 
2.51.0