Re: [PATCH] Partially Revert "of: fix sparse warnings in fdt, irq, reserved mem, and resolver code"

[Geert Uytterhoeven]

Hi Rob,

On Thu, May 11, 2017 at 5:30 PM, Rob Herring <robh@xxxxxxxxxx> wrote:
> A change to function pointers that was meant to address a sparse warning
> turned out to cause hundreds of new gcc-7 warnings:
>
> include/linux/of_irq.h:11:13: error: type qualifiers ignored on function return type [-Werror=ignored-qualifiers]
> drivers/of/of_reserved_mem.c: In function '__reserved_mem_init_node':
> drivers/of/of_reserved_mem.c:200:7: error: type qualifiers ignored on function return type [-Werror=ignored-qualifiers]
>    int const (*initfn)(struct reserved_mem *rmem) = i->data;

Not just gcc-7. Also with the good old 4.1.2 ;-)

> Turns out the sparse warnings were spurious and have been fixed in
> upstream sparse since 0.5.0 in commit "sparse: treat function pointers
> as pointers to const data".
>
> This partially reverts commit 17a70355ea576843a7ac851f1db26872a50b2850.
>
> Fixes: 17a70355ea57 ("of: fix sparse warnings in fdt, irq, reserved mem, and resolver code")
> Reported-by: Arnd Bergmann <arnd@xxxxxxxx>
> Signed-off-by: Rob Herring <robh@xxxxxxxxxx>

Acked-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds