From ef0297b527130ce851c3cb2276fb2729a28b254c Mon Sep 17 00:00:00 2001
From: Michael Brown <mcb30@ipxe.org>
Date: Fri, 18 Mar 2016 08:18:31 +0000
Subject: [PATCH] [libc] Allow container_of() to be used on volatile pointers

Signed-off-by: Michael Brown <mcb30@ipxe.org>
---
 src/include/stddef.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/include/stddef.h b/src/include/stddef.h
index 3c056294..fb01c489 100644
--- a/src/include/stddef.h
+++ b/src/include/stddef.h
@@ -34,7 +34,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
  */
 #define container_of( ptr, type, field ) ( {				\
 	type *__container;						\
-	const typeof ( __container->field ) *__field = (ptr);		\
+	const volatile typeof ( __container->field ) *__field = (ptr);	\
 	__container = ( ( ( void * ) __field ) -			\
 			offsetof ( type, field ) );			\
 	__container; } )