Re: [PATCH 1/2] bus: mhi: host: Add loopback driver with sysfs interface

[Markus Elfring]

…
> +++ b/drivers/bus/mhi/host/mhi_loopback.c
> @@ -0,0 +1,348 @@
…
> +static ssize_t start_store(struct device *dev,
> +			   struct device_attribute *attr,
> +			   const char *buf, size_t count)
> +{
> +	struct mhi_loopback *mhi_lb = dev_get_drvdata(dev);
> +	void *send_buf, *recv_buf;
…
> +	guard(mutex)(&mhi_lb->lb_mutex);
…
> +free_buf:
> +	kfree(send_buf);
> +free_recv_buf:
> +	kfree(recv_buf);
> +unlock:
+	mhi_lb->loopback_in_progress = false;
> +	return ret;
> +}
…

Under which circumstances would you become interested to apply an attribute
like “__free(kfree)”?
https://elixir.bootlin.com/linux/v6.17-rc7/source/include/linux/slab.h#L476

Regards,
Markus