To fix:

drivers/net/ethernet/mediatek/mtk_eth_soc.c:1685:1: error: unknown type name 'irqreturn_t'
drivers/net/ethernet/mediatek/mtk_eth_soc.c: In function 'mtk_handle_irq_rx':
drivers/net/ethernet/mediatek/mtk_eth_soc.c:1694:9: error: 'IRQ_HANDLED' undeclared (first use in this function)
drivers/net/ethernet/mediatek/mtk_eth_soc.c:1694:9: note: each undeclared identifier is reported only once for each function it appears in

and similar follow-on errors as seen in arm allmodconfig builds.

Cc: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
Cc: Felix Fietkau <redacted>
Cc: John Crispin <redacted>
Cc: Matthias Brugger <redacted>
Cc: linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Signed-off-by: Paul Gortmaker <redacted>
---

[Seen on current linux-next, where similar implicit irq includes
 were recently revealed by some header shuffle somewhere.]

 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 7e95cf547ff1..ea15eb095d83 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c

@@ -16,6 +16,7 @@
 #include <linux/of_mdio.h>
 #include <linux/of_net.h>
 #include <linux/mfd/syscon.h>
+#include <linux/interrupt.h>
 #include <linux/regmap.h>
 #include <linux/clk.h>
 #include <linux/pm_runtime.h>

-- 
2.11.0