From: Benoît Canet <benoit.canet@nodalink.com>
Date: Wed, 24 Jun 2015 21:18:39 +0000 (+0200)
Subject: libceph: Remove spurious kunmap() of the zero page
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6ba8edc0bcbdf337293e60123ddac8fc1c895a3c;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

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 967080a9f043..38f06a4c3c9e 100644
--- 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;
 }