From 1865f867fbe24ad11351ae2a196f117d8d55d0ca Mon Sep 17 00:00:00 2001
From: David Härdeman <david@hardeman.nu>
Date: Wed, 24 Jun 2020 02:10:58 +0200
Subject: Some more minor warning fixes

---
 shared/list.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'shared')

diff --git a/shared/list.h b/shared/list.h
index df4092a..be59dc9 100644
--- a/shared/list.h
+++ b/shared/list.h
@@ -1,6 +1,11 @@
 #ifndef foolisthfoo
 #define foolisthfoo
 
+/*
+ * Doubly linked list implementation from the Linux kernel
+ * Copyright Linus Torvalds et al, GPLv2
+*/
+
 struct list_head {
 	struct list_head *next;
 	struct list_head *prev;
@@ -46,7 +51,7 @@ static inline bool list_empty(struct list_head *list)
 
 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
 
-#define container_of(ptr, type, member) ({				\
+#define container_of(ptr, type, member) __extension__ ({		\
 	const typeof( ((type *)0)->member ) *__mptr = (ptr);		\
 	(type *)( (char *)__mptr - offsetof(type,member) );})
 
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