mm: page_alloc reduce lock sections further

Split out the pages which are to be freed into a separate list and
call free_pages_bulk() outside of the percpu page allocator locks.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/list.h b/include/linux/list.h
index 969f6e92d089..d62a35b4f9ba 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -345,6 +345,9 @@ static inline void list_splice_tail_init(struct list_head *list,
 #define list_first_entry(ptr, type, member) \
         list_entry((ptr)->next, type, member)
 
+#define list_last_entry(ptr, type, member) \
+        list_entry((ptr)->prev, type, member)
+
 /**
  * list_for_each        -       iterate over a list
  * @pos:        the &struct list_head to use as a loop cursor.