[PATCH][next] netns: Replace zero-length array with DECLARE_FLEX_ARRAY() helper

[Gustavo A. R. Silva]

Zero-length arrays are deprecated and we are moving towards adopting
C99 flexible-array members, instead. So, replace zero-length arrays
declarations in anonymous union with the new DECLARE_FLEX_ARRAY()
helper macro.

This helper allows for flexible-array members in unions.

Link: https://github.com/KSPP/linux/issues/193
Link: https://github.com/KSPP/linux/issues/225
Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
---
 include/net/netns/generic.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/net/netns/generic.h b/include/net/netns/generic.h
index 7ce68183f6e1..00c399edeed1 100644
--- a/include/net/netns/generic.h
+++ b/include/net/netns/generic.h
@@ -33,7 +33,7 @@ struct net_generic {
 			struct rcu_head rcu;
 		} s;
 
-		void *ptr[0];
+		DECLARE_FLEX_ARRAY(void *, ptr);
 	};
 };
 
-- 
2.34.1