[PATCH] powerpc/vdso: allow r30 in vDSO code generation of getrandom

[Jason A. Donenfeld]

On Wed, Sep 25, 2024 at 07:50:22PM +0200, Jason A. Donenfeld wrote:
> For gettimeofday, -ffixed-r30 was passed to work around a bug in Go
> code, where the vDSO trampoline forgot to save and restore this register
> across function calls. But Go requires a different trampoline for every
> call, and there's no reason that new Go code needs to be broken and add
> more bugs.  So remove -ffixed-r30 for getrandom.

Strangely, I am _unable to_ make the Go code not crash with this patch
applied. I'm not quite sure what I'm doing wrong yet, or if this points
to another issue.