[PATCH 1/3] mm/page_alloc: Move ifdefery out of free_area_init_core

[osalvador]

From: Oscar Salvador <osalva...@suse.de>

Moving the #ifdefs out of the function makes it easier to follow.

Signed-off-by: Oscar Salvador <osalva...@suse.de>
---
 mm/page_alloc.c | 50 +++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 37 insertions(+), 13 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e357189cd24a..8a73305f7c55 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6206,6 +6206,37 @@ static unsigned long __paginginit 
calc_memmap_size(unsigned long spanned_pages,
        return PAGE_ALIGN(pages * sizeof(struct page)) >> PAGE_SHIFT;
 }
 
+#ifdef CONFIG_NUMA_BALANCING
+static void pgdat_init_numabalancing(struct pglist_data *pgdat)
+{
+       spin_lock_init(&pgdat->numabalancing_migrate_lock);
+       pgdat->numabalancing_migrate_nr_pages = 0;
+       pgdat->numabalancing_migrate_next_window = jiffies;
+}
+#else
+static void pgdat_init_numabalancing(struct pglist_data *pgdat) {}
+#endif
+
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+static void pgdat_init_split_queue(struct pglist_data *pgdat)
+{
+       spin_lock_init(&pgdat->split_queue_lock);
+       INIT_LIST_HEAD(&pgdat->split_queue);
+       pgdat->split_queue_len = 0;
+}
+#else
+static void pgdat_init_split_queue(struct pglist_data *pgdat) {}
+#endif
+
+#ifdef CONFIG_COMPACTION
+static void pgdat_init_kcompactd(struct pglist_data *pgdat)
+{
+       init_waitqueue_head(&pgdat->kcompactd_wait);
+}
+#else
+static void pgdat_init_kcompactd(struct pglist_data *pgdat) {}
+#endif
+
 /*
  * Set up the zone data structures:
  *   - mark all pages reserved
@@ -6220,21 +6251,14 @@ static void __paginginit free_area_init_core(struct 
pglist_data *pgdat)
        int nid = pgdat->node_id;
 
        pgdat_resize_init(pgdat);
-#ifdef CONFIG_NUMA_BALANCING
-       spin_lock_init(&pgdat->numabalancing_migrate_lock);
-       pgdat->numabalancing_migrate_nr_pages = 0;
-       pgdat->numabalancing_migrate_next_window = jiffies;
-#endif
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-       spin_lock_init(&pgdat->split_queue_lock);
-       INIT_LIST_HEAD(&pgdat->split_queue);
-       pgdat->split_queue_len = 0;
-#endif
+
+       pgdat_init_numabalancing(pgdat);
+       pgdat_init_split_queue(pgdat);
+       pgdat_init_kcompactd(pgdat);
+
        init_waitqueue_head(&pgdat->kswapd_wait);
        init_waitqueue_head(&pgdat->pfmemalloc_wait);
-#ifdef CONFIG_COMPACTION
-       init_waitqueue_head(&pgdat->kcompactd_wait);
-#endif
+
        pgdat_page_ext_init(pgdat);
        spin_lock_init(&pgdat->lru_lock);
        lruvec_init(node_lruvec(pgdat));
-- 
2.13.6