Re: [PATCH v2 3/3] i387: support lazy restore of FPU state

From: H. Peter Anvin
Date: Mon Feb 20 2012 - 21:12:06 EST


On 02/20/2012 05:50 PM, Josh Boyer wrote:
>
> I haven't tried really figuring this out yet, but building the Fedora kernel
> on x86_64 with your latest tree results in:
>
> ERROR: "fpu_owner_task" [lib/raid6/raid6_pq.ko] undefined!
> ERROR: "fpu_owner_task" [arch/x86/kvm/kvm.ko] undefined!
> ERROR: "fpu_owner_task" [arch/x86/crypto/sha1-ssse3.ko] undefined!
> ERROR: "fpu_owner_task" [arch/x86/crypto/serpent-sse2-x86_64.ko] undefined!
> ERROR: "fpu_owner_task" [arch/x86/crypto/ghash-clmulni-intel.ko] undefined!
> make[1]: *** [__modpost] Error 1
> make: *** [modules] Error 2
> + exit 1
>
> Since this patch went in as 7e16838d94b566a1, I'm guessing it's at least
> related.
>
> I'm building again with more verbose output but I thought I'd send this out
> quickly.
>

fpu_owner_task needs an EXPORT_SYMBOL_GPL().

-hpa


--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.

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