wifi: wil6210: fw: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper

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

This helper allows for flexible-array members alone in structs.

Link: https://github.com/KSPP/linux/issues/193
Link: https://github.com/KSPP/linux/issues/287
Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/ZGKHByxujJoygK+l@work

diff --git a/drivers/net/wireless/ath/wil6210/fw.h b/drivers/net/wireless/ath/wil6210/fw.h
index 440614d..aa1620e 100644 (file)
--- a/drivers/net/wireless/ath/wil6210/fw.h
+++ b/drivers/net/wireless/ath/wil6210/fw.h
@@ -47,7 +47,7 @@ struct wil_fw_record_fill { /* type == wil_fw_type_fill */
  * for informational purpose, data_size is @head.size from record header
  */
 struct wil_fw_record_comment { /* type == wil_fw_type_comment */
-       u8 data[0]; /* free-form data [data_size], see above */
+       DECLARE_FLEX_ARRAY(u8, data); /* free-form data [data_size], see above */
 } __packed;
 
 /* Comment header - common for all comment record types */
@@ -131,7 +131,7 @@ struct wil_fw_data_dwrite {
  * data_size is @head.size where @head is record header
  */
 struct wil_fw_record_direct_write { /* type == wil_fw_type_direct_write */
-       struct wil_fw_data_dwrite data[0];
+       DECLARE_FLEX_ARRAY(struct wil_fw_data_dwrite, data);
 } __packed;
 
 /* verify condition: [@addr] & @mask == @value