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Date:   Tue, 2 Feb 2021 18:15:05 +0000
From:   Christoph Hellwig <hch@infradead.org>
To:     Ben Widawsky <ben.widawsky@intel.com>
Cc:     linux-cxl@vger.kernel.org, kernel test robot <lkp@intel.com>,
        linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
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        Bjorn Helgaas <helgaas@kernel.org>,
        Chris Browy <cbrowy@avery-design.com>,
        Christoph Hellwig <hch@infradead.org>,
        Dan Williams <dan.j.williams@intel.com>,
        Ira Weiny <ira.weiny@intel.com>,
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        daniel.lll@alibaba-inc.com,
        "John Groves (jgroves)" <jgroves@micron.com>,
        "Kelley, Sean V" <sean.v.kelley@intel.com>
Subject: Re: [PATCH 06/14] cxl/mem: Add basic IOCTL interface
Message-ID: <20210202181505.GF3708021@infradead.org>
References: <20210130002438.1872527-1-ben.widawsky@intel.com>
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> +#if defined(__cplusplus)
> +extern "C" {
> +#endif

This has no business in a kernel header.