--- zzzz-none-000/linux-3.10.107/include/linux/ceph/pagelist.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/include/linux/ceph/pagelist.h	2021-02-04 17:41:59.000000000 +0000
@@ -1,7 +1,10 @@
 #ifndef __FS_CEPH_PAGELIST_H
 #define __FS_CEPH_PAGELIST_H
 
+#include <asm/byteorder.h>
+#include <linux/atomic.h>
 #include <linux/list.h>
+#include <linux/types.h>
 
 struct ceph_pagelist {
 	struct list_head head;
@@ -10,6 +13,7 @@
 	size_t room;
 	struct list_head free_list;
 	size_t num_pages_free;
+	atomic_t refcnt;
 };
 
 struct ceph_pagelist_cursor {
@@ -26,9 +30,10 @@
 	pl->room = 0;
 	INIT_LIST_HEAD(&pl->free_list);
 	pl->num_pages_free = 0;
+	atomic_set(&pl->refcnt, 1);
 }
 
-extern int ceph_pagelist_release(struct ceph_pagelist *pl);
+extern void ceph_pagelist_release(struct ceph_pagelist *pl);
 
 extern int ceph_pagelist_append(struct ceph_pagelist *pl, const void *d, size_t l);