diff options
| author | Eric Dumazet <edumazet@google.com> | 2019-10-11 06:17:46 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-10-13 20:13:08 +0300 |
| commit | ab4e846a82d0ae00176de19f2db3c5c64f8eb5f2 (patch) | |
| tree | 7be26ef02ab2f2979be9a3cdeb36ed1bafc51354 /net/core/datagram.c | |
| parent | e292f05e0df73f9fcc93329663936e1ded97a988 (diff) | |
tcp: annotate sk->sk_wmem_queued lockless reads
For the sake of tcp_poll(), there are few places where we fetch
sk->sk_wmem_queued while this field can change from IRQ or other cpu.
We need to add READ_ONCE() annotations, and also make sure write
sides use corresponding WRITE_ONCE() to avoid store-tearing.
sk_wmem_queued_add() helper is added so that we can in
the future convert to ADD_ONCE() or equivalent if/when
available.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/datagram.c')
| -rw-r--r-- | net/core/datagram.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/datagram.c b/net/core/datagram.c index 4cc8dc5db2b7..c210fc116103 100644 --- a/net/core/datagram.c +++ b/net/core/datagram.c @@ -640,7 +640,7 @@ int __zerocopy_sg_from_iter(struct sock *sk, struct sk_buff *skb, skb->len += copied; skb->truesize += truesize; if (sk && sk->sk_type == SOCK_STREAM) { - sk->sk_wmem_queued += truesize; + sk_wmem_queued_add(sk, truesize); sk_mem_charge(sk, truesize); } else { refcount_add(truesize, &skb->sk->sk_wmem_alloc); |