linux-kernel - Question on "uaccess: Add strict non-pagefault kernel-space read function"

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Date:   Fri, 3 Apr 2020 06:35:33 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Daniel Borkmann <daniel@...earbox.net>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Masami Hiramatsu <mhiramat@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Question on "uaccess: Add strict non-pagefault kernel-space read
 function"

Hi Daniel,

I just stumbled over your above commit, and it really confuses me.

Not the newly added functions, which seems perfectly sane, but why you
left the crazy old functions in place instead of investing a little
bit of extra effort to clean the existing mess up and switch everyone
to the sane new variants?