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Message-ID: <Yz7Rl7BXamKQhRzH@smile.fi.intel.com>
Date: Thu, 6 Oct 2022 16:01:11 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: "Jason A. Donenfeld" <Jason@...c4.com>
Cc: Jan Kara <jack@...e.cz>, Andrew Lunn <andrew@...n.ch>,
"Darrick J . Wong" <djwong@...nel.org>,
Ulf Hansson <ulf.hansson@...aro.org>,
dri-devel@...ts.freedesktop.org,
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<christoph.boehmwalder@...bit.com>, Vinod Koul <vkoul@...nel.org>,
tipc-discussion@...ts.sourceforge.net, Thomas Graf <tgraf@...g.ch>,
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Sungjong Seo <sj1557.seo@...sung.com>,
Martin KaFai Lau <martin.lau@...ux.dev>
Subject: Re: [f2fs-dev] [PATCH v1 3/5] treewide: use get_random_u32() when
possible
On Thu, Oct 06, 2022 at 06:33:15AM -0600, Jason A. Donenfeld wrote:
> On Thu, Oct 06, 2022 at 10:43:31AM +0200, Jan Kara wrote:
...
> > The code here is effectively doing the
> >
> > parent_group = prandom_u32_max(ngroups);
> >
> > Similarly here we can use prandom_u32_max(ngroups) like:
> >
> > if (qstr) {
> > ...
> > parent_group = hinfo.hash % ngroups;
> > } else
> > parent_group = prandom_u32_max(ngroups);
>
> Nice catch. I'll move these to patch #1.
I believe coccinelle is able to handle this kind of code as well, so Kees'
proposal to use it seems more plausible since it's less error prone and more
flexible / powerful.
--
With Best Regards,
Andy Shevchenko
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