Revert "selinux: add a skb_owned_by() hook"

This reverts commit ca10b9e9a8ca7342ee07065289cbe74ac128c169.

No longer needed after commit eb8895debe1baba41fcb62c78a16f0c63c21662a
("tcp: tcp_make_synack() should use sock_wmalloc")

When under SYNFLOOD, we build lot of SYNACK and hit false sharing
because of multiple modifications done on sk_listener->sk_wmem_alloc

Since tcp_make_synack() uses sock_wmalloc(), there is no need
to call skb_set_owner_w() again, as this adds two atomic operations.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 8 deletions

diff --git a/include/linux/security.h b/include/linux/security.h
index a1b7dbd127ff..25a079a7c3b3 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -1716,7 +1716,6 @@ struct security_operations {
         int (*tun_dev_attach_queue) (void *security);
         int (*tun_dev_attach) (struct sock *sk, void *security);
         int (*tun_dev_open) (void *security);
-        void (*skb_owned_by) (struct sk_buff *skb, struct sock *sk);
 #endif  /* CONFIG_SECURITY_NETWORK */
 
 #ifdef CONFIG_SECURITY_NETWORK_XFRM
@@ -2735,8 +2734,6 @@ int security_tun_dev_attach_queue(void *security);
 int security_tun_dev_attach(struct sock *sk, void *security);
 int security_tun_dev_open(void *security);
 
-void security_skb_owned_by(struct sk_buff *skb, struct sock *sk);
-
 #else   /* CONFIG_SECURITY_NETWORK */
 static inline int security_unix_stream_connect(struct sock *sock,
                                                struct sock *other,
@@ -2928,11 +2925,6 @@ static inline int security_tun_dev_open(void *security)
 {
         return 0;
 }
-
-static inline void security_skb_owned_by(struct sk_buff *skb, struct sock *sk)
-{
-}
-
 #endif  /* CONFIG_SECURITY_NETWORK */
 
 #ifdef CONFIG_SECURITY_NETWORK_XFRM