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| author |   Eric Dumazet <edumazet@google.com> | 2019-10-09 15:10:15 -0700 |
|---|---|---|
| committer |   Jakub Kicinski <jakub.kicinski@netronome.com> | 2019-10-09 21:35:00 -0700 |
| commit | 1f142c17d19a5618d5a633195a46f2c8be9bf232 (patch) | |
| tree | b64b0a41ac143b7a2eefa20d06eab67a5c4f16da /include/net | |
| parent | net: add {READ|WRITE}_ONCE() annotations on ->rskq_accept_head (diff) | |
| download | linux-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.h | 2 |
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 |