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Date: Fri, 19 Sep 2014 17:19:08 +0200
From: Joakim Tjernlund <joakim.tjernlund@...nsmode.se>
To: Christophe Leroy <christophe.leroy@....fr>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>,
linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
Paul Mackerras <paulus@...ba.org>, scottwood@...escale.com
Subject: Re: [PATCH 2/2] powerpc32: add support for csum_add()
Christophe Leroy <christophe.leroy@....fr> wrote on 2014/09/19 15:57:56:
> Subject: [PATCH 2/2] powerpc32: add support for csum_add()
>
> The C version of csum_add() as defined in include/net/checksum.h gives
the
> following assembly:
> 0: 7c 04 1a 14 add r0,r4,r3
> 4: 7c 64 00 10 subfc r3,r4,r0
> 8: 7c 63 19 10 subfe r3,r3,r3
> c: 7c 63 00 50 subf r3,r3,r0
>
> include/net/checksum.h also offers the possibility to define an arch
specific
> function.
> This patch provides a ppc32 specific csum_add() inline function.
>
> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
>
> ---
Ouch, this is still so. Back in 2010 I reported this to gcc:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43892
Anyway,
Acked-by: Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>
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