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Message-ID: <Y0U+Y+VBqefDAZRG@osiris>
Date:   Tue, 11 Oct 2022 11:58:59 +0200
From:   Heiko Carstens <hca@...ux.ibm.com>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     linux-kernel@...r.kernel.org, patches@...ts.linux.dev,
        Andreas Noever <andreas.noever@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Christoph Böhmwalder 
        <christoph.boehmwalder@...bit.com>, Christoph Hellwig <hch@....de>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Daniel Borkmann <daniel@...earbox.net>,
        Dave Airlie <airlied@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Florian Westphal <fw@...len.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "H . Peter Anvin" <hpa@...or.com>, Helge Deller <deller@....de>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Huacai Chen <chenhuacai@...nel.org>,
        Hugh Dickins <hughd@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        Jan Kara <jack@...e.com>, Jason Gunthorpe <jgg@...pe.ca>,
        Jens Axboe <axboe@...nel.dk>,
        Johannes Berg <johannes@...solutions.net>,
        Jonathan Corbet <corbet@....net>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        KP Singh <kpsingh@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Marco Elver <elver@...gle.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Richard Weinberger <richard@....at>,
        Russell King <linux@...linux.org.uk>,
        "Theodore Ts'o" <tytso@....edu>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Thomas Graf <tgraf@...g.ch>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        WANG Xuerui <kernel@...0n.name>, Will Deacon <will@...nel.org>,
        Yury Norov <yury.norov@...il.com>,
        dri-devel@...ts.freedesktop.org, kasan-dev@...glegroups.com,
        kernel-janitors@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-block@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-mm@...ck.org,
        linux-mmc@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-nvme@...ts.infradead.org, linux-parisc@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-s390@...r.kernel.org,
        linux-um@...ts.infradead.org, linux-usb@...r.kernel.org,
        linux-wireless@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        loongarch@...ts.linux.dev, netdev@...r.kernel.org,
        sparclinux@...r.kernel.org, x86@...nel.org,
        Jan Kara <jack@...e.cz>, "Darrick J . Wong" <djwong@...nel.org>
Subject: Re: [PATCH v6 1/7] treewide: use prandom_u32_max() when possible,
 part 1

On Mon, Oct 10, 2022 at 05:06:07PM -0600, Jason A. Donenfeld wrote:
> Rather than incurring a division or requesting too many random bytes for
> the given range, use the prandom_u32_max() function, which only takes
> the minimum required bytes from the RNG and avoids divisions. This was
...
> Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Reviewed-by: Kees Cook <keescook@...omium.org>
> Reviewed-by: Yury Norov <yury.norov@...il.com>
> Reviewed-by: KP Singh <kpsingh@...nel.org>
> Reviewed-by: Jan Kara <jack@...e.cz> # for ext4 and sbitmap
> Reviewed-by: Christoph Böhmwalder <christoph.boehmwalder@...bit.com> # for drbd
> Acked-by: Ulf Hansson <ulf.hansson@...aro.org> # for mmc
> Acked-by: Darrick J. Wong <djwong@...nel.org> # for xfs
> Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>
> ---
>  arch/s390/kernel/process.c                    |  2 +-
>  arch/s390/kernel/vdso.c                       |  2 +-

For s390:
Acked-by: Heiko Carstens <hca@...ux.ibm.com>

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