linux-kernel - Re: [-mm patch] make csum_and_copy_from

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Date:	Fri, 11 May 2007 15:56:18 +0200
From:	Frederik Deweerdt <deweerdt@...e.fr>
To:	David Miller <davem@...emloft.net>
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [-mm patch] make csum_and_copy_from_user arch independent

On Fri, May 11, 2007 at 02:14:43AM -0700, David Miller wrote:
> From: Frederik Deweerdt <deweerdt@...e.fr>
> Date: Fri, 11 May 2007 10:27:38 +0200
> 
> > ERROR: "csum_partial_copy_from_user" [net/rxrpc/af-rxrpc.ko] undefined!
> > 
> > Linking on ARM fails because albeit a generic csum_and_copy_from_user()
> > function is provided in the case ! _HAVE_ARCH_COPY_AND_CSUM_FROM_USER, the
> > generic function uses csum_partial_copy_from_user() which is i386 only.
> 
> On what planet is csum_partial_copy_from_user() i386 only?
> Every single platform provides that function.
Er, my bad, I've changed my cscope bindings and I saw no results except
i386.
> The issue more-so appears to be that ARM simply fails to
> export the symbol to modules like the other platforms do.
Indeed, here's the fix.

Thanks,
Frederik

Signed-off-by: Frederik Deweerdt <frederik.deweerdt@...il.com>

diff --git a/arch/arm/kernel/armksyms.c b/arch/arm/kernel/armksyms.c
index 4779f47..9179e82 100644
--- a/arch/arm/kernel/armksyms.c
+++ b/arch/arm/kernel/armksyms.c
@@ -76,6 +76,7 @@ EXPORT_SYMBOL(__const_udelay);
 
 	/* networking */
 EXPORT_SYMBOL(csum_partial);
+EXPORT_SYMBOL(csum_partial_copy_from_user);
 EXPORT_SYMBOL(csum_partial_copy_nocheck);
 EXPORT_SYMBOL(__csum_ipv6_magic);
 
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