Hi Greg, hehe, you must've answered this over and over again, but I don't see the need for __mptr in the container_of() macro. I tried googling it but couldn't find much.
I get the macro, but not the need __mptr. Wouldn't this work the same
way ?
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 80d3687..bbce857 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -717,8 +717,7 @@ static inline void ftrace_dump(enum ftrace_dump_mode
oops_dump_mode) { }
*
*/
#define container_of(ptr, type, member) ({ \
- const typeof( ((type *)0)->member ) *__mptr = (ptr); \
- (type *)( (char *)__mptr - offsetof(type,member) );})
+ (type *)( (char *)(ptr) - offsetof(type,member) );})
/* Trap pasters of __FUNCTION__ at compile-time */
#define __FUNCTION__ (__func__)
why do we need this type * NULL ?
thanks
--
balbi
signature.asc
Description: Digital signature
