aboutsummaryrefslogtreecommitdiffstats
path: root/include
diff options
context:
space:
mode:
authorEric Dumazet <edumazet@google.com>2019-10-09 15:10:15 -0700
committerJakub Kicinski <jakub.kicinski@netronome.com>2019-10-09 21:35:00 -0700
commit1f142c17d19a5618d5a633195a46f2c8be9bf232 (patch)
treeb64b0a41ac143b7a2eefa20d06eab67a5c4f16da /include
parentnet: add {READ|WRITE}_ONCE() annotations on ->rskq_accept_head (diff)
downloadlinux-dev-1f142c17d19a5618d5a633195a46f2c8be9bf232.tar.xz
linux-dev-1f142c17d19a5618d5a633195a46f2c8be9bf232.zip
tcp: annotate lockless access to tcp_memory_pressure
tcp_memory_pressure is read without holding any lock, and its value could be changed on other cpus. Use READ_ONCE() to annotate these lockless reads. The write side is already using atomic ops. Fixes: b8da51ebb1aa ("tcp: introduce tcp_under_memory_pressure()") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Diffstat (limited to '')
-rw-r--r--include/net/tcp.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index c9a3f9688223..88e63d64c698 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -258,7 +258,7 @@ static inline bool tcp_under_memory_pressure(const struct sock *sk)
mem_cgroup_under_socket_pressure(sk->sk_memcg))
return true;
- return tcp_memory_pressure;
+ return READ_ONCE(tcp_memory_pressure);
}
/*
* The next routines deal with comparing 32 bit unsigned ints