Introduce ARRAY_SIZE_OF_FIELD() in order to get the number of elements of an array struct field. Signed-off-by: Lucas Segarra Fernandez <lucas.segarra.fernandez@xxxxxxxxx> Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@xxxxxxxxx> Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> --- include/linux/array_size.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/array_size.h b/include/linux/array_size.h index 06d7d83196ca..37dac0473b5c 100644 --- a/include/linux/array_size.h +++ b/include/linux/array_size.h @@ -10,4 +10,12 @@ */ #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) +/* + * ARRAY_SIZE_OF_FIELD - get the number of elements of an array struct field + * + * @TYPE: The structure containing the field of interest + * @MEMBER: The array field to be sized + */ +#define ARRAY_SIZE_OF_FIELD(TYPE, MEMBER) ARRAY_SIZE((((TYPE *)0)->MEMBER)) + #endif /* _LINUX_ARRAY_SIZE_H */ -- 2.41.0
