[PATCH v5 07/13] xen/page_alloc: introduce init_free_page_fields() helper

[Carlo Nonato <carlo.nonato@xxxxxxxxxxxxxxx>]

Introduce a new helper to initialize fields that have different uses for
free pages.

Signed-off-by: Carlo Nonato <carlo.nonato@xxxxxxxxxxxxxxx>
Signed-off-by: Marco Solieri <marco.solieri@xxxxxxxxxxxxxxx>
---
v5:
- new patch
---
 xen/common/page_alloc.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c
index d874525916..9ee3981bb5 100644
--- a/xen/common/page_alloc.c
+++ b/xen/common/page_alloc.c
@@ -928,6 +928,13 @@ static struct page_info *get_free_buddy(unsigned int 
zone_lo,
     }
 }
 
+/* Initialise fields which have other uses for free pages. */
+static void init_free_page_fields(struct page_info *pg)
+{
+    pg->u.inuse.type_info = PGT_TYPE_INFO_INITIALIZER;
+    page_set_owner(pg, NULL);
+}
+
 /* Allocate 2^@order contiguous pages. */
 static struct page_info *alloc_heap_pages(
     unsigned int zone_lo, unsigned int zone_hi,
@@ -1036,10 +1043,7 @@ static struct page_info *alloc_heap_pages(
             accumulate_tlbflush(&need_tlbflush, &pg[i],
                                 &tlbflush_timestamp);
 
-        /* Initialise fields which have other uses for free pages. */
-        pg[i].u.inuse.type_info = PGT_TYPE_INFO_INITIALIZER;
-        page_set_owner(&pg[i], NULL);
-
+        init_free_page_fields(&pg[i]);
     }
 
     spin_unlock(&heap_lock);
@@ -2802,9 +2806,7 @@ static bool prepare_staticmem_pages(struct page_info *pg, 
unsigned long nr_mfns,
          * to PGC_state_inuse.
          */
         pg[i].count_info = PGC_static | PGC_state_inuse;
-        /* Initialise fields which have other uses for free pages. */
-        pg[i].u.inuse.type_info = PGT_TYPE_INFO_INITIALIZER;
-        page_set_owner(&pg[i], NULL);
+        init_free_page_fields(&pg[i]);
     }
 
     spin_unlock(&heap_lock);
-- 
2.34.1