Re: [PATCH] ARM: Build secure_cntvoff.S unconditionally to fix shmobile !SMP build

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Hi Russell,

On Wed, Jun 6, 2018 at 11:27 AM, Russell King - ARM Linux
<linux@xxxxxxxxxxxxxxx> wrote:
> On Wed, Jun 06, 2018 at 11:22:41AM +0200, Geert Uytterhoeven wrote:
>> On Wed, Jun 6, 2018 at 11:09 AM, Russell King - ARM Linux
>> <linux@xxxxxxxxxxxxxxx> wrote:
>> >> Fixes: cad160ed0a94927e ("ARM: shmobile: Convert file to use cntvoff")
>> >> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
>> >
>> > This doesn't look right to me, but I don't have secure_cntvoff in any
>> > tree here that I can look at to check.  What if secure_cntvoff contains
>> > instructions only available on ARMv7 CPUs, and not ARMv4?
>>
>> Compiled != called.
>
> That makes little difference when the assembler validates that the
> instructions are possible on the target architecture and errors out
> if not.

The file does have ".arch armv7-a".

> That's why I qualified my reply by saying that I didn't have the
> contents of secure_cntvoff to reference - there's no clue whether
> it's a .c or .S file from just this patch, and there's no visibility
> what it contains.

https://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc.git/commit/?id=7c607944bc657616
https://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc.git/commit/?id=cad160ed0a94927e

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



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