ceph: fix pagelist kunmap tail

[pandora-kernel.git] / fs / ceph / pagelist.c

diff --git a/fs/ceph/pagelist.c b/fs/ceph/pagelist.c
index b6859f4..46a368b 100644 (file)
--- a/fs/ceph/pagelist.c
+++ b/fs/ceph/pagelist.c
@@ -5,10 +5,18 @@
 
 #include "pagelist.h"
 
+static void ceph_pagelist_unmap_tail(struct ceph_pagelist *pl)
+{
+       struct page *page = list_entry(pl->head.prev, struct page,
+                                      lru);
+       kunmap(page);
+}
+
 int ceph_pagelist_release(struct ceph_pagelist *pl)
 {
        if (pl->mapped_tail)
-               kunmap(pl->mapped_tail);
+               ceph_pagelist_unmap_tail(pl);
+
        while (!list_empty(&pl->head)) {
                struct page *page = list_first_entry(&pl->head, struct page,
                                                     lru);
@@ -26,7 +34,7 @@ static int ceph_pagelist_addpage(struct ceph_pagelist *pl)
        pl->room += PAGE_SIZE;
        list_add_tail(&page->lru, &pl->head);
        if (pl->mapped_tail)
-               kunmap(pl->mapped_tail);
+               ceph_pagelist_unmap_tail(pl);
        pl->mapped_tail = kmap(page);
        return 0;
 }