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list.h: implement type safety for container_of()

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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
This commit is contained in:
Felix Fietkau 2013-03-18 05:54:44 +01:00
parent cdb9f71971
commit 009b4d574e
1 changed files with 5 additions and 2 deletions
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7
list.h
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@ -35,8 +35,11 @@
#define prefetch(x)
#ifndef container_of
#define container_of(ptr, type, member) ( \
(type *)( (char *)ptr - offsetof(type,member) ))
#define container_of(ptr, type, member) \
({ \
const typeof(((type *) NULL)->member) *__mptr = (ptr); \
(type *) ((char *) __mptr - offsetof(type, member)); \
})
#endif
struct list_head {