From: Al Viro
Date: Fri, 5 Jul 2019 20:14:16 +0100
> socket->wq is assign-once, set when we are initializing both
> struct socket it's in and struct socket_wq it points to. As the
> matter of fact, the only reason for separate allocation was the
> ability to RCU-delay freeing of socket_wq. RCU-
socket->wq is assign-once, set when we are initializing both
struct socket it's in and struct socket_wq it points to. As the
matter of fact, the only reason for separate allocation was the
ability to RCU-delay freeing of socket_wq. RCU-delaying the
freeing of socket itself gets rid of that need,
