[NET]: prot_inuse cleanups and optimizations

1) Cleanups (all functions are prefixed by sock_prot_inuse)

sock_prot_inc_use(prot) -> sock_prot_inuse_add(prot,-1)
sock_prot_dec_use(prot) -> sock_prot_inuse_add(prot,-1)
sock_prot_inuse()       -> sock_prot_inuse_get()

New functions :

sock_prot_inuse_init() and sock_prot_inuse_free() to abstract pcounter use.

2) if CONFIG_PROC_FS=n, we can zap 'inuse' member from "struct proto",
since nobody wants to read the inuse value.

This saves 1372 bytes on i386/SMP and some cpu cycles.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 4 deletions

diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index 53bc010beefd..cb3787fbeb90 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -53,13 +53,14 @@ static int sockstat_seq_show(struct seq_file *seq, void *v)
 {
         socket_seq_show(seq);
         seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
-                   sock_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count),
+                   sock_prot_inuse_get(&tcp_prot),
+                   atomic_read(&tcp_orphan_count),
                    tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
                    atomic_read(&tcp_memory_allocated));
-        seq_printf(seq, "UDP: inuse %d mem %d\n", sock_prot_inuse(&udp_prot),
+        seq_printf(seq, "UDP: inuse %d mem %d\n", sock_prot_inuse_get(&udp_prot),
                    atomic_read(&udp_memory_allocated));
-        seq_printf(seq, "UDPLITE: inuse %d\n", sock_prot_inuse(&udplite_prot));
-        seq_printf(seq, "RAW: inuse %d\n", sock_prot_inuse(&raw_prot));
+        seq_printf(seq, "UDPLITE: inuse %d\n", sock_prot_inuse_get(&udplite_prot));
+        seq_printf(seq, "RAW: inuse %d\n", sock_prot_inuse_get(&raw_prot));
         seq_printf(seq,  "FRAG: inuse %d memory %d\n",
                         ip_frag_nqueues(), ip_frag_mem());
         return 0;