mm/page_alloc: inline function to handle CONFIG_DEFERRED_STRUCT_PAGE_INIT

Let us move the code between CONFIG_DEFERRED_STRUCT_PAGE_INIT to an inline
function.  Not having an ifdef in the function makes the code more
readable.

Link: http://lkml.kernel.org/r/20180730101757.28058-4-osalvador@techadventures.net
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Aaron Lu <aaron.lu@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Pasha Tatashin <Pavel.Tatashin@microsoft.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 16 insertions, 9 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 98fe3b68f209..5b939bd1bff9 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6364,6 +6364,21 @@ static void __ref alloc_node_mem_map(struct pglist_data *pgdat)
 static void __ref alloc_node_mem_map(struct pglist_data *pgdat) { }
 #endif /* CONFIG_FLAT_NODE_MEM_MAP */
 
+#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
+static inline void pgdat_set_deferred_range(pg_data_t *pgdat)
+{
+        /*
+         * We start only with one section of pages, more pages are added as
+         * needed until the rest of deferred pages are initialized.
+         */
+        pgdat->static_init_pgcnt = min_t(unsigned long, PAGES_PER_SECTION,
+                                                pgdat->node_spanned_pages);
+        pgdat->first_deferred_pfn = ULONG_MAX;
+}
+#else
+static inline void pgdat_set_deferred_range(pg_data_t *pgdat) {}
+#endif
+
 void __meminit free_area_init_node(int nid, unsigned long *zones_size,
                                    unsigned long node_start_pfn,
                                    unsigned long *zholes_size)
@@ -6390,16 +6405,8 @@ void __meminit free_area_init_node(int nid, unsigned long *zones_size,
                                   zones_size, zholes_size);
 
         alloc_node_mem_map(pgdat);
+        pgdat_set_deferred_range(pgdat);
 
-#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
-        /*
-         * We start only with one section of pages, more pages are added as
-         * needed until the rest of deferred pages are initialized.
-         */
-        pgdat->static_init_pgcnt = min_t(unsigned long, PAGES_PER_SECTION,
-                                         pgdat->node_spanned_pages);
-        pgdat->first_deferred_pfn = ULONG_MAX;
-#endif
         free_area_init_core(pgdat);
 }