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-rw-r--r--include/net/busy_poll.h68
1 files changed, 38 insertions, 30 deletions
diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h
index c55760f4820f..72c82f2ea536 100644
--- a/include/net/busy_poll.h
+++ b/include/net/busy_poll.h
@@ -46,62 +46,70 @@ static inline bool net_busy_loop_on(void)
return sysctl_net_busy_poll;
}
-static inline u64 busy_loop_us_clock(void)
+static inline bool sk_can_busy_loop(const struct sock *sk)
{
- return local_clock() >> 10;
+ return sk->sk_ll_usec && !signal_pending(current);
}
-static inline unsigned long sk_busy_loop_end_time(struct sock *sk)
-{
- return busy_loop_us_clock() + ACCESS_ONCE(sk->sk_ll_usec);
-}
+void sk_busy_loop(struct sock *sk, int nonblock);
-/* in poll/select we use the global sysctl_net_ll_poll value */
-static inline unsigned long busy_loop_end_time(void)
+#else /* CONFIG_NET_RX_BUSY_POLL */
+static inline unsigned long net_busy_loop_on(void)
{
- return busy_loop_us_clock() + ACCESS_ONCE(sysctl_net_busy_poll);
+ return 0;
}
-static inline bool sk_can_busy_loop(const struct sock *sk)
+static inline bool sk_can_busy_loop(struct sock *sk)
{
- return sk->sk_ll_usec && !signal_pending(current);
+ return false;
}
-static inline bool busy_loop_timeout(unsigned long end_time)
+static inline void sk_busy_loop(struct sock *sk, int nonblock)
{
- unsigned long now = busy_loop_us_clock();
-
- return time_after(now, end_time);
}
-void sk_busy_loop(struct sock *sk, int nonblock);
+#endif /* CONFIG_NET_RX_BUSY_POLL */
-#else /* CONFIG_NET_RX_BUSY_POLL */
-static inline unsigned long net_busy_loop_on(void)
+static inline unsigned long busy_loop_current_time(void)
{
+#ifdef CONFIG_NET_RX_BUSY_POLL
+ return (unsigned long)(local_clock() >> 10);
+#else
return 0;
+#endif
}
-static inline unsigned long busy_loop_end_time(void)
+/* in poll/select we use the global sysctl_net_ll_poll value */
+static inline bool busy_loop_timeout(unsigned long start_time)
{
- return 0;
-}
+#ifdef CONFIG_NET_RX_BUSY_POLL
+ unsigned long bp_usec = READ_ONCE(sysctl_net_busy_poll);
-static inline bool sk_can_busy_loop(struct sock *sk)
-{
- return false;
-}
+ if (bp_usec) {
+ unsigned long end_time = start_time + bp_usec;
+ unsigned long now = busy_loop_current_time();
-static inline bool busy_loop_timeout(unsigned long end_time)
-{
+ return time_after(now, end_time);
+ }
+#endif
return true;
}
-static inline void sk_busy_loop(struct sock *sk, int nonblock)
+static inline bool sk_busy_loop_timeout(struct sock *sk,
+ unsigned long start_time)
{
-}
+#ifdef CONFIG_NET_RX_BUSY_POLL
+ unsigned long bp_usec = READ_ONCE(sk->sk_ll_usec);
-#endif /* CONFIG_NET_RX_BUSY_POLL */
+ if (bp_usec) {
+ unsigned long end_time = start_time + bp_usec;
+ unsigned long now = busy_loop_current_time();
+
+ return time_after(now, end_time);
+ }
+#endif
+ return true;
+}
/* used in the NIC receive handler to mark the skb */
static inline void skb_mark_napi_id(struct sk_buff *skb,