Re: [PATCH] x86/fpu: Remove the _GPL from the kernel_fpu_begin/end() export

[Jiri Kosina]

On Fri, 3 May 2019, Jiri Kosina wrote:

> > Please don't start this. We have everything _GPL that is used for FPU
> > related code and only a few functions are exported because KVM needs it.
> 
> That's not completely true. There are a lot of static inlines out there, 
> which basically made it possible for external modules to use FPU (in some 
> way) when they had kernel_fpu_[begin|end]() available.

... any for many uses that's really the only thing that's needed.

	kernel_fpu_beign();
	asm volatile ("some SSE2/AVX/... math");
	kernel_fpu_end();

No other bits of the FPU API, so there is no way of getting anything wrong 
because of FPU intrinsic details really.

So I don't really see a problem with Andy's patch. If we want to annoy 
external non-GPL modules as much as possible, sure, that's for a separate 
discussion though (and I am sure many people would agree to that). 
Proposal to get rid of EXPORT_SYMBOL in favor of EXPORT_SYMBOL_GPL would 
be a good start I guess :)

-- 
Jiri Kosina
SUSE Labs