diff options
Diffstat (limited to 'kernel/include/containter_of.h')
| -rw-r--r-- | kernel/include/containter_of.h | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/kernel/include/containter_of.h b/kernel/include/containter_of.h index 766847a..9cadd91 100644 --- a/kernel/include/containter_of.h +++ b/kernel/include/containter_of.h @@ -5,7 +5,7 @@ #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) -#define typeof_member(T, m) typeof(((T*)0)->m) +#define typeof_member(T, m) typeof(((T *)0)->m) /** * container_of - cast a member of a structure out to the containing structure @@ -14,12 +14,14 @@ * @member: the name of the member within the struct. * */ -#define container_of(ptr, type, member) ({ \ - void *__mptr = (void *)(ptr); \ - static_assert(__same_type(*(ptr), ((type *)0)->member) || \ - __same_type(*(ptr), void), \ - "pointer type mismatch in container_of()"); \ - ((type *)(__mptr - offsetof(type, member))); }) +#define container_of(ptr, type, member) \ + ({ \ + void *__mptr = (void *)(ptr); \ + static_assert(__same_type(*(ptr), ((type *)0)->member) || \ + __same_type(*(ptr), void), \ + "pointer type mismatch in container_of()"); \ + ((type *)(__mptr - offsetof(type, member))); \ + }) /** * container_of_safe - cast a member of a structure out to the containing structure @@ -29,12 +31,15 @@ * * If IS_ERR_OR_NULL(ptr), ptr is returned unchanged. */ -#define container_of_safe(ptr, type, member) ({ \ - void *__mptr = (void *)(ptr); \ - static_assert(__same_type(*(ptr), ((type *)0)->member) || \ - __same_type(*(ptr), void), \ - "pointer type mismatch in container_of_safe()"); \ - IS_ERR_OR_NULL(__mptr) ? ERR_CAST(__mptr) : \ - ((type *)(__mptr - offsetof(type, member))); }) +#define container_of_safe(ptr, type, member) \ + ({ \ + void *__mptr = (void *)(ptr); \ + static_assert(__same_type(*(ptr), ((type *)0)->member) || \ + __same_type(*(ptr), void), \ + "pointer type mismatch in container_of_safe()"); \ + IS_ERR_OR_NULL(__mptr) ? \ + ERR_CAST(__mptr) : \ + ((type *)(__mptr - offsetof(type, member))); \ + }) #endif |