1 files changed, 0 insertions, 125 deletions
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 5927c20ba43f..73810d2d630c 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -491,131 +491,6 @@ struct efx_channel {
 	u32 sync_timestamp_minor;
 };
 
-#ifdef CONFIG_NET_RX_BUSY_POLL
-enum efx_channel_busy_poll_state {
-	EFX_CHANNEL_STATE_IDLE = 0,
-	EFX_CHANNEL_STATE_NAPI = BIT(0),
-	EFX_CHANNEL_STATE_NAPI_REQ_BIT = 1,
-	EFX_CHANNEL_STATE_NAPI_REQ = BIT(1),
-	EFX_CHANNEL_STATE_POLL_BIT = 2,
-	EFX_CHANNEL_STATE_POLL = BIT(2),
-	EFX_CHANNEL_STATE_DISABLE_BIT = 3,
-};
-
-static inline void efx_channel_busy_poll_init(struct efx_channel *channel)
-{
-	WRITE_ONCE(channel->busy_poll_state, EFX_CHANNEL_STATE_IDLE);
-}
-
-/* Called from the device poll routine to get ownership of a channel. */
-static inline bool efx_channel_lock_napi(struct efx_channel *channel)
-{
-	unsigned long prev, old = READ_ONCE(channel->busy_poll_state);
-
-	while (1) {
-		switch (old) {
-		case EFX_CHANNEL_STATE_POLL:
-			/* Ensure efx_channel_try_lock_poll() wont starve us */
-			set_bit(EFX_CHANNEL_STATE_NAPI_REQ_BIT,
-				&channel->busy_poll_state);
-			/* fallthrough */
-		case EFX_CHANNEL_STATE_POLL | EFX_CHANNEL_STATE_NAPI_REQ:
-			return false;
-		default:
-			break;
-		}
-		prev = cmpxchg(&channel->busy_poll_state, old,
-			       EFX_CHANNEL_STATE_NAPI);
-		if (unlikely(prev != old)) {
-			/* This is likely to mean we've just entered polling
-			 * state. Go back round to set the REQ bit.
-			 */
-			old = prev;
-			continue;
-		}
-		return true;
-	}
-}
-
-static inline void efx_channel_unlock_napi(struct efx_channel *channel)
-{
-	/* Make sure write has completed from efx_channel_lock_napi() */
-	smp_wmb();
-	WRITE_ONCE(channel->busy_poll_state, EFX_CHANNEL_STATE_IDLE);
-}
-
-/* Called from efx_busy_poll(). */
-static inline bool efx_channel_try_lock_poll(struct efx_channel *channel)
-{
-	return cmpxchg(&channel->busy_poll_state, EFX_CHANNEL_STATE_IDLE,
-			EFX_CHANNEL_STATE_POLL) == EFX_CHANNEL_STATE_IDLE;
-}
-
-static inline void efx_channel_unlock_poll(struct efx_channel *channel)
-{
-	clear_bit_unlock(EFX_CHANNEL_STATE_POLL_BIT, &channel->busy_poll_state);
-}
-
-static inline bool efx_channel_busy_polling(struct efx_channel *channel)
-{
-	return test_bit(EFX_CHANNEL_STATE_POLL_BIT, &channel->busy_poll_state);
-}
-
-static inline void efx_channel_enable(struct efx_channel *channel)
-{
-	clear_bit_unlock(EFX_CHANNEL_STATE_DISABLE_BIT,
-			 &channel->busy_poll_state);
-}
-
-/* Stop further polling or napi access.
- * Returns false if the channel is currently busy polling.
- */
-static inline bool efx_channel_disable(struct efx_channel *channel)
-{
-	set_bit(EFX_CHANNEL_STATE_DISABLE_BIT, &channel->busy_poll_state);
-	/* Implicit barrier in efx_channel_busy_polling() */
-	return !efx_channel_busy_polling(channel);
-}
-
-#else /* CONFIG_NET_RX_BUSY_POLL */
-
-static inline void efx_channel_busy_poll_init(struct efx_channel *channel)
-{
-}
-
-static inline bool efx_channel_lock_napi(struct efx_channel *channel)
-{
-	return true;
-}
-
-static inline void efx_channel_unlock_napi(struct efx_channel *channel)
-{
-}
-
-static inline bool efx_channel_try_lock_poll(struct efx_channel *channel)
-{
-	return false;
-}
-
-static inline void efx_channel_unlock_poll(struct efx_channel *channel)
-{
-}
-
-static inline bool efx_channel_busy_polling(struct efx_channel *channel)
-{
-	return false;
-}
-
-static inline void efx_channel_enable(struct efx_channel *channel)
-{
-}
-
-static inline bool efx_channel_disable(struct efx_channel *channel)
-{
-	return true;
-}
-#endif /* CONFIG_NET_RX_BUSY_POLL */
-
 /**
  * struct efx_msi_context - Context for each MSI
  * @efx: The associated NIC