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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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4
net/dccp/proto.c
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@ -336,7 +336,7 @@ unsigned int dccp_poll(struct file *file, struct socket *sock,
mask |= POLLIN | POLLRDNORM;
if (!(sk->sk_shutdown & SEND_SHUTDOWN)) {
if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) {
if (sk_stream_is_writeable(sk)) {
mask |= POLLOUT | POLLWRNORM;
} else { /* send SIGIO later */
set_bit(SOCK_ASYNC_NOSPACE,
@ -347,7 +347,7 @@ unsigned int dccp_poll(struct file *file, struct socket *sock,
* wspace test but before the flags are set,
* IO signal will be lost.
*/
if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk))
if (sk_stream_is_writeable(sk))
mask |= POLLOUT | POLLWRNORM;
}
}