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can: ucan: Replace zero-length array with DECLARE_FLEX_ARRAY() helper

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Zero-length arrays are deprecated and we are moving towards adopting
C99 flexible-array members, instead. So, replace zero-length arrays
declarations in anonymous union with the new DECLARE_FLEX_ARRAY()
helper macro.

This helper allows for flexible-array members in unions.

Link: https://github.com/KSPP/linux/issues/193
Link: https://github.com/KSPP/linux/issues/214
Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/all/YzIdHDdz30BH4SAv@work
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Gustavo A. R. Silva 2022-09-26 16:43:56 -05:00 committed by Marc Kleine-Budde
parent 1dd1b521be
commit b2df8a1bc3
1 changed files with 2 additions and 1 deletions
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3
drivers/net/can/usb/ucan.c
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@ -245,7 +245,8 @@ struct ucan_message_in {
/* CAN transmission complete
* (type == UCAN_IN_TX_COMPLETE)
*/
struct ucan_tx_complete_entry_t can_tx_complete_msg[0];
DECLARE_FLEX_ARRAY(struct ucan_tx_complete_entry_t,
can_tx_complete_msg);
} __aligned(0x4) msg;
} __packed __aligned(0x4);