linux-kernel - Re: [PATCH 10/15] selftests/seccomp: Avoid redundant register flushes

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Message-ID: <20200915160840.6ybm67gowqeqyms2@wittgenstein>
Date:   Tue, 15 Sep 2020 18:08:40 +0200
From:   Christian Brauner <christian.brauner@...ntu.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     linux-kernel@...r.kernel.org,
        Thadeu Lima de Souza Cascardo <cascardo@...onical.com>,
        Max Filippov <jcmvbkbc@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Christian Brauner <christian@...uner.io>,
        Andy Lutomirski <luto@...capital.net>,
        Will Drewry <wad@...omium.org>,
        linux-kselftest@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-xtensa@...ux-xtensa.org,
        linux-arm-kernel@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 10/15] selftests/seccomp: Avoid redundant register flushes

On Sat, Sep 12, 2020 at 04:08:15AM -0700, Kees Cook wrote:
> When none of the registers have changed, don't flush them back. This can
> happen if the architecture uses a non-register way to change the syscall
> (e.g. arm64) , and a return value hasn't been written.
> 
> Signed-off-by: Kees Cook <keescook@...omium.org>
> ---

Looks good!
Acked-by: Christian Brauner <christian.brauner@...ntu.com>