GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-19 21:21:09 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

can: introduce CAN_REQUIRED_SIZE macro

Browse source 
The size of this structure will be increased with J1939 support. To stay
binary compatible, the CAN_REQUIRED_SIZE macro is introduced for
existing CAN protocols.

Signed-off-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Kurt Van Dijck 2018-10-08 11:48:33 +02:00 • committed by Marc Kleine-Budde
parent 4f746fb495
commit 9868b5d44f
3 changed files with 12 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

8
include/linux/can/core.h
View file

@ -41,6 +41,14 @@ struct can_proto {
struct proto *prot;
};
/* required_size
* macro to find the minimum size of a struct
* that includes a requested member
*/
#define CAN_REQUIRED_SIZE(struct_type, member) \
(offsetof(typeof(struct_type), member) + \
sizeof(((typeof(struct_type) *)(NULL))->member))
/* function prototypes for the CAN networklayer core (af_can.c) */
extern int can_proto_register(const struct can_proto *cp);