linux-kernel - Re: [PATCH v1 1/1] libnvdimm: Don't use GUID APIs against raw buffer

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Message-ID: <CAPcyv4iwiJwwgiisZTqk6F=A8hLJCGkK-4suqDMPYYiLzuLwFA@mail.gmail.com>
Date:   Fri, 16 Apr 2021 13:08:06 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-nvdimm <linux-nvdimm@...ts.01.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        "Kaneda, Erik" <erik.kaneda@...el.com>
Subject: Re: [PATCH v1 1/1] libnvdimm: Don't use GUID APIs against raw buffer

[ add Erik ]

On Fri, Apr 16, 2021 at 10:36 AM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> On Thu, Apr 15, 2021 at 05:37:54PM +0300, Andy Shevchenko wrote:
> > Strictly speaking the comparison between guid_t and raw buffer
> > is not correct. Return to plain memcmp() since the data structures
> > haven't changed to use uuid_t / guid_t the current state of affairs
> > is inconsistent. Either it should be changed altogether or left
> > as is.
>
> Dan, please review this one as well. I think here you may agree with me.

You know, this is all a problem because ACPICA is using a raw buffer.

Erik, would it be possible to use the guid_t type in ACPICA? That
would allow NFIT to drop some ugly casts.