[binutils-gdb/gdb-7.10-branch] Fix stale cleanup left by linux_mntns_access_fs

[Gary Benson <gary at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=23778dcc5bb92541850e239d10bf19eb311a57b6

commit 23778dcc5bb92541850e239d10bf19eb311a57b6
Author: Gary Benson <gbenson@redhat.com>
Date:   Fri Aug 21 16:55:53 2015 +0100

    Fix stale cleanup left by linux_mntns_access_fs
    
    This commit fixes a stale cleanup left by linux_mntns_access_fs.
    
    gdb/ChangeLog:
    
    	* nat/linux-namespaces.c (linux_mntns_access_fs):
    	Do not overwrite old_chain.

Diff:
---
 gdb/ChangeLog              | 5 +++++
 gdb/nat/linux-namespaces.c | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index d2a6cbc..fe07c5c 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2015-08-21  Gary Benson  <gbenson@redhat.com>
+
+	* nat/linux-namespaces.c (linux_mntns_access_fs):
+	Do not overwrite old_chain.
+
 2015-08-21  Pedro Alves  <palves@redhat.com>
 
 	* remote.c (struct readahead_cache): New.
diff --git a/gdb/nat/linux-namespaces.c b/gdb/nat/linux-namespaces.c
index a7a3e4d..6fb0a2b 100644
--- a/gdb/nat/linux-namespaces.c
+++ b/gdb/nat/linux-namespaces.c
@@ -894,7 +894,7 @@ linux_mntns_access_fs (pid_t pid)
   if (fd < 0)
     goto error;
 
-  old_chain = make_cleanup_close (fd);
+  make_cleanup_close (fd);
 
   if (fstat (fd, &sb) != 0)
     goto error;