> +static int dm_bufio_trylock(struct dm_bufio_client *c)
> +{
> + return dm_bufio_trylock(c);
> +}
> +
> +static void dm_bufio_unlock(struct dm_bufio_client *c)
> +{
> + dm_bufio_unlock(c);
> +}
These two functions are recursive nonsense :) There should be
"return mutex_trylock(&c->lock);" and "mutex_unlock(&c->lock);".
Mikulas