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net: refactor socket_poll

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Factor out two busy poll related helpers for late reuse, and remove
a command that isn't very helpful, especially with the __poll_t
annotations in place.

Signed-off-by: Christoph Hellwig <[email protected]>
This commit is contained in:
Christoph Hellwig 2018-01-09 16:07:34 +01:00
commit 3cafb37633
2 changed files with 19 additions and 17 deletions
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15
include/net/busy_poll.h
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@ -121,6 +121,21 @@ static inline void sk_busy_loop(struct sock *sk, int nonblock)
#endif
}
static inline void sock_poll_busy_loop(struct socket *sock, __poll_t events)
{
if (sk_can_busy_loop(sock->sk) &&
events && (events & POLL_BUSY_LOOP)) {
/* once, only if requested by syscall */
sk_busy_loop(sock->sk, 1);
}
}
/* if this socket can poll_ll, tell the system call */
static inline __poll_t sock_poll_busy_flag(struct socket *sock)
{
return sk_can_busy_loop(sock->sk) ? POLL_BUSY_LOOP : 0;
}
/* used in the NIC receive handler to mark the skb */
static inline void skb_mark_napi_id(struct sk_buff *skb,
struct napi_struct *napi)