Re: [PATCH v5 1/2] serial: qcom-geni: trace: Drop redundant len field from geni_serial_data

From: Konrad Dybcio

Date: Thu Jun 18 2026 - 05:00:49 EST


On 6/15/26 4:16 PM, Praveen Talari wrote:
> The dynamic array stored in the ring buffer already carries its own
> length in the array metadata. There is no need to also store it as a
> separate scalar field in the entry struct.
>
> Drop __field(unsigned int, len) and the corresponding __entry->len
> assignment, and use __get_dynamic_array_len(data) in the TP_printk for
> both the len=%u format argument and the __print_hex() size argument.
> This saves 4 bytes per event on the ring buffer.
>
> Signed-off-by: Praveen Talari <praveen.talari@xxxxxxxxxxxxxxxx>
> ---

Suggested-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>

Konrad