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From:   Michael Ellerman <mpe@ellerman.id.au>
To:     Linus Torvalds <torvalds@linux-foundation.org>,
        Jann Horn <jannh@google.com>
Cc:     Jiri Kosina <jikos@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Greg KH <gregkh@linuxfoundation.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Michal Hocko <mhocko@suse.com>, Linux-MM <linux-mm@kvack.org>,
        kernel list <linux-kernel@vger.kernel.org>,
        Linux API <linux-api@vger.kernel.org>
Subject: Re: [PATCH] mm/mincore: allow for making sys_mincore() privileged
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Date:   Mon, 07 Jan 2019 21:10:46 +1100
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Linus Torvalds <torvalds@linux-foundation.org> writes:

> On Sat, Jan 5, 2019 at 3:16 PM Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
>>
>> It goes back to forever, it looks like. I can't find a reason.
>
> mincore() was originally added in 2.3.52pre3, it looks like. Around
> 2000 or so. But sadly before the BK history.

Yeah, it's here in the commit titled "Import 2.3.52pre3" (takes a second
or two to load):

  https://github.com/mpe/linux-fullhistory/commit/a1bcda3256956318c95c8da8bee09f79190bb034#diff-fd2d793b8b4760b4887c8c7bbb3451d7R1730

But no further detail.

(Instructions for using that tree https://github.com/mpe/linux-fullhistory/wiki)

cheers