bury struct proc_ns in fs/proc
a) make get_proc_ns() return a pointer to struct ns_common
b) mirror ns_ops in dentry->d_fsdata of ns dentries, so that
is_mnt_ns_file() could get away with fewer dereferences.
That way struct proc_ns becomes invisible outside of fs/proc/*.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index 87c3722..49746c8 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -222,7 +222,6 @@
{
struct task_struct *tsk = current;
struct nsproxy *new_nsproxy;
- struct proc_ns *ei;
struct file *file;
struct ns_common *ns;
int err;
@@ -232,8 +231,7 @@
return PTR_ERR(file);
err = -EINVAL;
- ei = get_proc_ns(file_inode(file));
- ns = ei->ns;
+ ns = get_proc_ns(file_inode(file));
if (nstype && (ns->ops->type != nstype))
goto out;