264  * flex_array_size() - Calculate size of a flexible array member
267  * @member: Name of the flexible array member.
270  * Calculates size of a flexible array of @count number of @member
275 #define flex_array_size(p, member, count)				\  argument
277 		(count) * sizeof(*(p)->member) + __must_be_array((p)->member),	\
278 		size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
283  * @member: Name of the array member.
287  * array of @count number of @member elements.
291 #define struct_size(p, member, count)					\  argument
293 		sizeof(*(p)) + flex_array_size(p, member, count),	\
294 		size_add(sizeof(*(p)), flex_array_size(p, member, count)))
299  * @member: Name of the array member.
303  * array of @count number of @member elements. Prefer using struct_size()
309 #define struct_size_t(type, member, count)					\  argument
310 	struct_size((type *)NULL, member, count)
318  * @member: Name of the array member.
322 #define _DEFINE_FLEX(type, name, member, count, initializer)			\  argument
326 		u8 bytes[struct_size_t(type, member, count)];			\
333  * flexible array member.
337  * @member: Name of the array member.
341  * flexible array member.
344 #define DEFINE_FLEX(type, name, member, count)			\  argument
345 	_DEFINE_FLEX(type, name, member, count, = {})