[v2 2/2] [PowerPC] Allow use of SIMD in interrupts from kernel code

[Shawn Landden]

On Tue, May 14, 2019 at 2:22 AM Russell Currey <ruscur at russell.cc> wrote:
>
> On Mon, 2019-05-13 at 23:23 -0300, Shawn Landden wrote:
> > This second patch is separate because it could be wrong,
> > like I am not sure about how kernel thread migration works,
> > and it is even allowing simd in preemptible kernel code.
> >
> > Signed-off-by: Shawn Landden <shawn at git.icu>
> > ---
>
> Hi Shawn,
>
> This patch doesn't build on 64-bit embedded (ppc64e_defconfig):
>
> arch/powerpc/kernel/process.c:194:13: error: 'interrupted_kernel_fpu_idle' defined but not used [-Werror=unused-function]
>  static bool interrupted_kernel_fpu_idle(void)
>              ^~~~~~~~~~~~~~~~~~~~~~~~~~~
Thanks for noticing this. I knew what I needed to do, and this was
just sloppiness on my end.
>
> and otherwise adds two sparse warnings:
>
> +arch/powerpc/kernel/process.c:356:13: warning: function 'disable_kernel_altivec' with external linkage has definition
> +arch/powerpc/kernel/process.c:416:6: warning: symbol 'may_use_simd' was not declared. Should it be static?
This is the same problem as above.
>
> There's also some style issues (spaces instead of tabs).
Yes, I have to be careful using nano on a VPS.

New patch coming in 1 sec.
>
> Reported by snowpatch (see https://patchwork.ozlabs.org/patch/1099181/)
>
> - Russell
>