linux-kernel - Re: [PATCH 05/17] prmem: shorthands for write rare on common types

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Message-ID: <fbb38802-3dc3-4890-c981-724b9096a6be@intel.com>
Date:   Wed, 24 Oct 2018 17:28:12 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Igor Stoppa <igor.stoppa@...il.com>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        Kees Cook <keescook@...omium.org>,
        Matthew Wilcox <willy@...radead.org>,
        Dave Chinner <david@...morbit.com>,
        James Morris <jmorris@...ei.org>,
        Michal Hocko <mhocko@...nel.org>,
        kernel-hardening@...ts.openwall.com,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org
Cc:     igor.stoppa@...wei.com, Dave Hansen <dave.hansen@...ux.intel.com>,
        Jonathan Corbet <corbet@....net>,
        Laura Abbott <labbott@...hat.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Pavel Tatashin <pasha.tatashin@...cle.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 05/17] prmem: shorthands for write rare on common types

On 10/23/18 2:34 PM, Igor Stoppa wrote:
> Wrappers around the basic write rare functionality, addressing several
> common data types found in the kernel, allowing to specify the new
> values through immediates, like constants and defines.

I have to wonder whether this is the right way, or whether a
size-agnostic function like put_user() is the right way.  put_user() is
certainly easier to use.