[PATCH 5.15 135/262] net: of: fix stub of_net helpers for CONFIG_NET=n

[Greg Kroah-Hartman]

From: Arnd Bergmann <arnd@xxxxxxxx>

[ Upstream commit 8b017fbe0bbb98dd71fb4850f6b9cc0e136a26b8 ]

Moving the of_net code from drivers/of/ to net/core means we
no longer stub out the helpers when networking is disabled,
which leads to a randconfig build failure with at least one
ARM platform that calls this from non-networking code:

arm-linux-gnueabi-ld: arch/arm/mach-mvebu/kirkwood.o: in function `kirkwood_dt_eth_fixup':
kirkwood.c:(.init.text+0x54): undefined reference to `of_get_mac_address'

Restore the way this worked before by changing that #ifdef
check back to testing for both CONFIG_OF and CONFIG_NET.

Fixes: e330fb14590c ("of: net: move of_net under net/")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Link: https://lore.kernel.org/r/20211014090055.2058949-1-arnd@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 include/linux/of_net.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/of_net.h b/include/linux/of_net.h
index cf31188329b5a..55460ecfa50ad 100644
--- a/include/linux/of_net.h
+++ b/include/linux/of_net.h
@@ -8,7 +8,7 @@
 
 #include <linux/phy.h>
 
-#ifdef CONFIG_OF
+#if defined(CONFIG_OF) && defined(CONFIG_NET)
 #include <linux/of.h>
 
 struct net_device;
-- 
2.34.1