Re: Commit 0d989ac2c90b broke my x86-64 build.

[Peter Zijlstra]

On Sun, Oct 24, 2021 at 09:51:45PM -0500, Rob Landley wrote:
> > Unfortunately I think CONFIG_STACK_VALIDATION is no longer optional on
> > x86-64 these days, because of static calls and retpolines.
> 
> Does it need stack validation, or just a frame unwinder?

static_calls rely on objtool to find all "call __SCT*" instructions and
write their location in a .static_call_sites section.

The having of static calls is not optional on x86_64, and I have zero
interest in trying to work out what not having static_call() does, or to
maintain that option.

We have too damn many daft configurations as is.