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>

1 files changed, 5 insertions, 0 deletions

diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index aa7a0ee182e1..0fabc48d905f 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -57,6 +57,11 @@ union proc_op {
 		struct task_struct *task);
 };
 
+struct proc_ns {
+	struct ns_common *ns;
+	const struct proc_ns_operations *ns_ops;
+};
+
 struct proc_inode {
 	struct pid *pid;
 	int fd;