libceph: Remove spurious kunmap() of the zero page

ceph_tcp_sendpage already does the work of mapping/unmapping
the zero page if needed.

Signed-off-by: Benoît Canet <benoit.canet@nodalink.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 967080a9f0436e8575663909572f063ac60440fe..38f06a4c3c9e75172edd9343247daebcf39062b6 100644 (file)
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -278,7 +278,6 @@ static void _ceph_msgr_exit(void)
        ceph_msgr_slab_exit();
 
        BUG_ON(zero_page == NULL);
-       kunmap(zero_page);
        page_cache_release(zero_page);
        zero_page = NULL;
 }