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In-Reply-To: <23e680624680a9a5405f4b88740d2596d4b17c26.1587143308.git.christophe.leroy@c-s.fr>
To:     Christophe Leroy <christophe.leroy@c-s.fr>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>, npiggin@gmail.com,
        segher@kernel.crashing.org
From:   Michael Ellerman <patch-notifications@ellerman.id.au>
Cc:     linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 1/2] powerpc/uaccess: Implement unsafe_put_user() using 'asm goto'
Message-Id: <49YBKY13Szz9sT4@ozlabs.org>
Date:   Fri, 29 May 2020 14:24:16 +1000 (AEST)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Fri, 2020-04-17 at 17:08:51 UTC, Christophe Leroy wrote:
> unsafe_put_user() is designed to take benefit of 'asm goto'.
> 
> Instead of using the standard __put_user() approach and branch
> based on the returned error, use 'asm goto' and make the
> exception code branch directly to the error label. There is
> no code anymore in the fixup section.
> 
> This change significantly simplifies functions using
> unsafe_put_user()
...
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
> Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>

Applied to powerpc topic/uaccess-ppc, thanks.

https://git.kernel.org/powerpc/c/334710b1496af8a0960e70121f850e209c20958f

cheers