Re: [PATCH 13/16] xfs: implement demand load of utf8norm.ko

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

> +int
> +xfs_init_utf8_module(struct xfs_mount        *mp)
> +{
> +     request_module("utf8norm");
> +
> +     spin_lock(&utf8norm_lock);
> +     if (utf8norm_initialized) {
> +             spin_unlock(&utf8norm_lock);
> +             return 0;
> +     }
> +
> +     utf8version_is_supported_func = symbol_get(utf8version_is_supported);
> +     if (!utf8version_is_supported_func)
> +             goto error;
> +
> +     utf8nfkdi_func = symbol_get(utf8nfkdi);
> +     if (!utf8nfkdi_func)
> +             goto error;

Please export a structure with a function pointes so that we just need
a single symbol_get call.  I'd have to look up how symbol_get works,
but unless there's something that speaks against this it might be
simpler to than just do a symbol_get per mounst structure that uses
utf8 and can point to that structure so that we don't have to add
additional reference counting infrastructure around it.