tree c2c8f726402610aee77ccca0627a4c38f944640b
parent 33c429405a2c8d9e42afb9fee88a63cfb2de1e98
author Al Viro <viro@zeniv.linux.org.uk> 1414825997 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1417721694 -0500

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>