[PATCH 2/4] NET : makes ipv4 use the {DEFINE|REF}_PROTO_INUSE infrastructure

Trivial patch to make "tcp,udp,udplite,raw" protocols uses the fast 
"inuse sockets" infrastructure

Each protocol use then a static percpu var, instead of a dynamic one. 
This saves some ram and some cpu cycles


Signed-off-by: Eric Dumazet <redacted>

 net/ipv4/raw.c      |    3 +++
 net/ipv4/tcp_ipv4.c |    3 +++
 net/ipv4/udp.c      |    3 +++
 net/ipv4/udplite.c  |    3 +++
 4 files changed, 12 insertions(+)