Zero-length arrays as fake flexible arrays are deprecated and we are moving towards adopting C99 flexible-array members instead. Use the DECLARE_FLEX_ARRAY() helper macro to transform zero-length arrays in unions with flexible-array members. Address the following warning found with GCC-13 and -fstrict-flex-arrays=3 enabled: drivers/iio/accel/cros_ec_accel_legacy.c:66:46: warning: array subscript <unknown> is outside array bounds of ‘struct ec_response_motion_sensor_data[0]’ [-Warray-bounds=] This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines on memcpy() and help us make progress towards globally enabling -fstrict-flex-arrays=3 [1].
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| @@ -2701,7 +2701,7 @@ struct ec_response_motion_sense { · 2700 unmodified lines | ||
| 2701 | 2701 | * Sensor data is truncated if response_max is too small |
| 2702 | 2702 | * for holding all the data. |
| 2703 | 2703 | */ |
| 2704 | − struct ec_response_motion_sensor_data sensor[0]; | |
| 2704 | + DECLARE_FLEX_ARRAY(struct ec_response_motion_sensor_data, sensor); | |
| 2705 | 2705 | } dump; |
| 2706 | 2706 | |
| 2707 | 2707 | /* Used for MOTIONSENSE_CMD_INFO. */ |