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net: add sk_stream_is_writeable() helper

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Several call sites use the hardcoded following condition :

sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)

Lets use a helper because TCP_NOTSENT_LOWAT support will change this
condition for TCP sockets.

Signed-off-by: Eric Dumazet <[email protected]>
Cc: Neal Cardwell <[email protected]>
Cc: Yuchung Cheng <[email protected]>
Acked-by: Neal Cardwell <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eric Dumazet 2013-07-22 20:26:31 -07:00 • committed by David S. Miller
commit 64dc61306c
7 changed files with 12 additions and 8 deletions
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2
net/sunrpc/svcsock.c
View file

@ -442,7 +442,7 @@ static void svc_tcp_write_space(struct sock *sk)
{
struct socket *sock = sk->sk_socket;
if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk) && sock)
if (sk_stream_is_writeable(sk) && sock)
clear_bit(SOCK_NOSPACE, &sock->flags);
svc_write_space(sk);
}

2
net/sunrpc/xprtsock.c
View file

@ -1602,7 +1602,7 @@ static void xs_tcp_write_space(struct sock *sk)
read_lock_bh(&sk->sk_callback_lock);
/* from net/core/stream.c:sk_stream_write_space */
if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk))
if (sk_stream_is_writeable(sk))
xs_write_space(sk);
read_unlock_bh(&sk->sk_callback_lock);