linux-kernel - Re: [PATCH v5 1/9] lib: zstd: Add zstd compatibility wrapper

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Date:   Mon, 16 Nov 2020 16:52:31 +0000
From:   Christoph Hellwig <hch@...radead.org>
To:     Chris Mason <clm@...com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Nick Terrell <nickrterrell@...il.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        linux-crypto@...r.kernel.org, linux-btrfs@...r.kernel.org,
        squashfs-devel@...ts.sourceforge.net,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Kernel Team <Kernel-team@...com>,
        Nick Terrell <terrelln@...com>, Petr Malat <oss@...at.biz>,
        Johannes Weiner <jweiner@...com>,
        Niket Agarwal <niketa@...com>, Yann Collet <cyan@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v5 1/9] lib: zstd: Add zstd compatibility wrapper

On Tue, Nov 10, 2020 at 02:24:35PM -0500, Chris Mason wrote:
> I think APIs change based on the needs of the project.  We do this all the
> time in the kernel, and we don???t think twice about updating users of the
> API as needed.

We update kernel APIs when:

 - we need additional functionality
 - thew new API is clearly better than the old one

None of that seems to be the case here.