On Mon, Aug 26, 2019 at 09:23:36AM -0400, Nayna Jain wrote:
> +static struct bin_attribute update_attr = {
> +     .attr = {.name = "update", .mode = 0200},
> +     .size = VARIABLE_MAX_SIZE,
> +     .write = update_write,
> +};

Ah, do we need a __BIN_ATTR_WO() macro for you?  That would make this
more obvious, right?

Other than that minor thing (not a complaint at all) looks much better
to me, nice work:

Reviewed-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

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