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

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Message-ID: <4F42FD69.2090800@zytor.com>
Date:	Mon, 20 Feb 2012 18:11:53 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Josh Boyer <jwboyer@...il.com>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 3/3] i387: support lazy restore of FPU state

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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