linux-kernel - Re: [PATCH] zstd: Fix definition of assert()

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Date:   Fri, 3 Mar 2023 15:27:15 +0100
From:   Jonathan Neuschäfer <j.neuschaefer@....net>
To:     Nick Terrell <terrelln@...a.com>
Cc:     Jonathan Neuschäfer <j.neuschaefer@....net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] zstd: Fix definition of assert()

On Fri, Mar 03, 2023 at 06:30:47AM +0000, Nick Terrell wrote:
> On Jan 29, 2023, at 5:14 AM, Jonathan Neuschäfer <j.neuschaefer@....net> wrote:
> > 
> > assert(x) should emit a warning if x is false. WARN_ON(x) emits a
> > warning if x is true. Thus, assert(x) should be defined as WARN_ON(!x)
> > rather than WARN_ON(x).
> > 
> > Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@....net>
> 
> Hi Jonathan,
> 
> I have to apologize, I just submitted my branch for a PR and I realize that
> while I intended to take your patch, I took a different equivalent patch. So
> I wanted to say thanks for sending the patch!

No problem at all, and thanks for informing me!

> 
> > ---
> > 
> > Commit e0c1b49f5b674 ("lib: zstd: Upgrade to latest upstream zstd
> > version 1.4.10") mentions that the zstd code was generated from the
> > upstream version of zstd, so perhaps the definition of assert based on
> > WARN_ON should be fixed in the conversion script and/or upstream zstd
> > source code.
> 
> Yeah, we need to fix it upstream, so if you would like to submit the upstream PR
> the file is contrib/linux-kernel/zstd_deps.h [0]. Otherwise, I will update it before
> the next import.

Feel free to do it yourself, as I haven't been involed with zstd
developement so far.


Thanks,
Jonathan

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