linux-kernel - Re: [PATCH v6 1/7] treewide: use prandom_u32

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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>,
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        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
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        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>