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authorJohannes Weiner <hannes@cmpxchg.org>2016-01-15 02:21:05 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-15 03:00:49 +0300
commit3d596f7b907b0281b997cf30c92994a71ad0a1a9 (patch)
treec039825abb7b78cc1cbe3d06e2a2fe481f81f3af /net/ipv4/tcp.c
parent931f3f4beb031cd483c1c8ab159ef1f8bdbe8888 (diff)
downloadlinux-3d596f7b907b0281b997cf30c92994a71ad0a1a9.tar.xz
net: tcp_memcontrol: protect all tcp_memcontrol calls by jump-label
Move the jump-label from sock_update_memcg() and sock_release_memcg() to the callsite, and so eliminate those function calls when socket accounting is not enabled. This also eliminates the need for dummy functions because the calls will be optimized away if the Kconfig options are not enabled. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: David S. Miller <davem@davemloft.net> Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net/ipv4/tcp.c')
-rw-r--r--net/ipv4/tcp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 7bb1b091efd1..fd17eec93525 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -422,7 +422,8 @@ void tcp_init_sock(struct sock *sk)
sk->sk_rcvbuf = sysctl_tcp_rmem[1];
local_bh_disable();
- sock_update_memcg(sk);
+ if (mem_cgroup_sockets_enabled)
+ sock_update_memcg(sk);
sk_sockets_allocated_inc(sk);
local_bh_enable();
}