> +/**
quoted text
> + * try_to_cancel_delayed_work - Try to kill pending scheduled, delayed work
> + * @work: the work to cancel
> + *
> + * Try to kill off a pending schedule_delayed_work().
> + * - The timer may still be running afterwards, and if so, the work may still
> + *   be pending
> + * - Returns -1 if timer still active, 1 if timer removed, 0 if not scheduled
> + * - Can be called from the work routine; if it's still pending, just return
> + *   and it'll be called again.
> + */
> +static inline int try_to_cancel_delayed_work(struct delayed_work *work)
> +{
> +	int ret;

This expands to a fair bit of code and IMHO isn't an inline candidate.

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