Subject: [PATCH AUTOSEL 5.6 02/62] net: drop_monitor: use IS_REACHABLE() to guard net_dm_hw_report()

From: Sasha Levin <[email-masked]>
Date: Thu, 14 May 2020 14:50:47 -0400

From: Masahiro Yamada <[email-masked]>

[ Upstream commit 1cd9b3abf5332102d4d967555e7ed861a75094bf ]

In net/Kconfig, NET_DEVLINK implies NET_DROP_MONITOR.

The original behavior of the 'imply' keyword prevents NET_DROP_MONITOR
from being 'm' when NET_DEVLINK=y.

With the planned Kconfig change that relaxes the 'imply', the
combination of NET_DEVLINK=y and NET_DROP_MONITOR=m would be allowed.

Use IS_REACHABLE() to avoid the vmlinux link error for this case.

Reported-by: Stephen Rothwell <[email-masked]>
Signed-off-by: Masahiro Yamada <[email-masked]>
Acked-by: Neil Horman <[email-masked]>
Signed-off-by: Sasha Levin <[email-masked]>
---
 include/net/drop_monitor.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/net/drop_monitor.h b/include/net/drop_monitor.h
index 2ab668461463e..f68bc373544a9 100644
--- a/include/net/drop_monitor.h
+++ b/include/net/drop_monitor.h
@@ -19,7 +19,7 @@ struct net_dm_hw_metadata {
 	struct net_device *input_dev;
 };
 
-#if IS_ENABLED(CONFIG_NET_DROP_MONITOR)
+#if IS_REACHABLE(CONFIG_NET_DROP_MONITOR)
 void net_dm_hw_report(struct sk_buff *skb,
 		      const struct net_dm_hw_metadata *hw_metadata);
 #else
-- 
2.20.1