[PATCH 1/2] Fix container_of() macro to work with const members
From: Jan Blunck <hidden>
Date: 2017-02-14 14:36:17
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
This fixes the usage of structure members that are declared const to get a pointer to the embedding parent structure. Signed-off-by: Jan Blunck <redacted> --- lib/librte_eal/common/include/rte_common.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/lib/librte_eal/common/include/rte_common.h b/lib/librte_eal/common/include/rte_common.h
index 8dda3e2..c421708 100644
--- a/lib/librte_eal/common/include/rte_common.h
+++ b/lib/librte_eal/common/include/rte_common.h@@ -347,8 +347,9 @@ rte_bsf32(uint32_t v) */ #ifndef container_of #define container_of(ptr, type, member) __extension__ ({ \ - typeof(((type *)0)->member) *_ptr = (ptr); \ - (type *)(((char *)_ptr) - offsetof(type, member)); }) + const typeof(((type *)0)->member) *_ptr = (ptr); \ + (type *)(((uintptr_t)_ptr) - offsetof(type, member)); \ + }) #endif #define _RTE_STR(x) #x
--
2.7.4