linux-kernel - Re: [PATCH 1/8] S390: Remove sentinel elem from ctl

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Message-ID: <ZPmS/zkAs66pLcum@li-008a6a4c-3549-11b2-a85c-c5cc2836eea2.ibm.com>
Date:   Thu, 7 Sep 2023 11:08:15 +0200
From:   Alexander Gordeev <agordeev@...ux.ibm.com>
To:     j.granados@...sung.com
Cc:     Luis Chamberlain <mcgrof@...nel.org>, willy@...radead.org,
        josh@...htriplett.org, Kees Cook <keescook@...omium.org>,
        Iurii Zaikin <yzaikin@...gle.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Gerald Schaefer <gerald.schaefer@...ux.ibm.com>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Guo Ren <guoren@...nel.org>, linux-fsdevel@...r.kernel.org,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org,
        linux-ia64@...r.kernel.org, linux-csky@...r.kernel.org
Subject: Re: [PATCH 1/8] S390: Remove sentinel elem from ctl_table arrays

On Wed, Sep 06, 2023 at 12:03:22PM +0200, Joel Granados via B4 Relay wrote:
> From: Joel Granados <j.granados@...sung.com>
> 
> This commit comes at the tail end of a greater effort to remove the
> empty elements at the end of the ctl_table arrays (sentinels) which
> will reduce the overall build time size of the kernel and run time
> memory bloat by ~64 bytes per sentinel (further information Link :
> https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)
> 
> Remove the sentinel element from appldata_table, s390dbf_table,
> topology_ctl_table, cmm_table and page_table_sysctl. Reduced the
> memory allocation in appldata_register_ops by 1 effectively removing the
> sentinel from ops->ctl_table.
> 
> Signed-off-by: Joel Granados <j.granados@...sung.com>
> ---
>  arch/s390/appldata/appldata_base.c | 6 ++----
>  arch/s390/kernel/debug.c           | 3 +--
>  arch/s390/kernel/topology.c        | 3 +--
>  arch/s390/mm/cmm.c                 | 3 +--
>  arch/s390/mm/pgalloc.c             | 3 +--
>  5 files changed, 6 insertions(+), 12 deletions(-)

Tested-by: Alexander Gordeev <agordeev@...ux.ibm.com>