linux-kernel - Re: [PATCH 1/3] mm/sparse: Clean up the obsolete code comment

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Date:   Thu, 21 Mar 2019 04:24:35 -0600
From:   William Kucharski <william.kucharski@...cle.com>
To:     Baoquan He <bhe@...hat.com>
Cc:     Matthew Wilcox <willy@...radead.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Oscar Salvador <osalvador@...e.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Pavel Tatashin <pasha.tatashin@...cle.com>, mhocko@...e.com,
        rppt@...ux.vnet.ibm.com, richard.weiyang@...il.com,
        linux-mm@...ck.org
Subject: Re: [PATCH 1/3] mm/sparse: Clean up the obsolete code comment

> On Mar 21, 2019, at 3:21 AM, Baoquan He <bhe@...hat.com> wrote:

It appears as is so often the case that the usage has far outpaced the
documentation and -EEXIST may be the proper code to return.

The correct answer here may be to modify the documentation to note the
additional semantic, though if the usage is solely within the kernel it
may be sufficient to explain its use in the header comment for the
routine (in this case sparse_add_one_section()).