Functionally, the statement-expression is not necessary here; it
just gives a bit of type-safety to make sure the pointer really
does have a compatible type with the specified member of the struct.
When statement expressions are not available, we can just use a
portable fallback macro that skips this member type check.
Signed-off-by: Michael Forney <mforney@xxxxxxxxxxx>
---
lib/ext2fs/compiler.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/lib/ext2fs/compiler.h b/lib/ext2fs/compiler.h
index 9aa9b4ec..03c35ab8 100644
--- a/lib/ext2fs/compiler.h
+++ b/lib/ext2fs/compiler.h
@@ -14,9 +14,14 @@
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
+#ifdef __GNUC__
#define container_of(ptr, type, member) ({ \
const __typeof__( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
+#else
+#define container_of(ptr, type, member) \
+ ((type *)((char *)(ptr) - offsetof(type, member)))
+#endif
#endif /* _EXT2FS_COMPILER_H */
--
2.30.1
