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dup_mnt_ns(): get rid of pointless grabbing of vfsmount_lock
author
Al Viro
<viro@zeniv.linux.org.uk>
Tue, 17 Sep 2013 02:22:16 +0000
(22:22 -0400)
committer
Al Viro
<viro@zeniv.linux.org.uk>
Fri, 25 Oct 2013 03:34:55 +0000
(23:34 -0400)
mnt_list is protected by namespace_sem, not vfsmount_lock
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
fs/namespace.c
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diff --git
a/fs/namespace.c
b/fs/namespace.c
index
0e54ad6
..
17ff147
100644
(file)
--- a/
fs/namespace.c
+++ b/
fs/namespace.c
@@
-2444,9
+2444,7
@@
static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
return ERR_CAST(new);
}
new_ns->root = new;
- br_write_lock(&vfsmount_lock);
list_add_tail(&new_ns->list, &new->mnt_list);
- br_write_unlock(&vfsmount_lock);
/*
* Second pass: switch the tsk->fs->* elements and mark new vfsmounts