Make all Ethernet drivers be compiled with the equivalent of W=1
as defined today.

Signed-off-by: Andrew Lunn <and...@lunn.ch>
---
 drivers/net/ethernet/Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
index f8f38dcb5f8a..8162b2f6ec81 100644
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -3,6 +3,9 @@
 # Makefile for the Linux network Ethernet device drivers.
 #
 
+# Enable W=1, as defined on the given date
+subdir-ccflags-y := $(KBUILD_CFLAGS_W1_20200930)
+
 obj-$(CONFIG_NET_VENDOR_3COM) += 3com/
 obj-$(CONFIG_NET_VENDOR_8390) += 8390/
 obj-$(CONFIG_NET_VENDOR_ADAPTEC) += adaptec/
-- 
2.28.0

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