From: Michael Brown <mcb30@ipxe.org>
Date: Fri, 18 Mar 2016 08:18:31 +0000 (+0000)
Subject: [libc] Allow container_of() to be used on volatile pointers
X-Git-Tag: v1.20.1~515
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ef0297b527130ce851c3cb2276fb2729a28b254c;p=thirdparty%2Fipxe.git

[libc] Allow container_of() to be used on volatile pointers

Signed-off-by: Michael Brown <mcb30@ipxe.org>
---

diff --git a/src/include/stddef.h b/src/include/stddef.h
index 3c056294f..fb01c489d 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; } )