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Date:   Wed, 18 May 2022 08:44:48 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Kohei Tarumizu <tarumizu.kohei@fujitsu.com>
Cc:     catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de,
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        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v4 6/8] x86: Add hardware prefetch control support for x86
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References: <20220518063032.2377351-1-tarumizu.kohei@fujitsu.com>
 <20220518063032.2377351-7-tarumizu.kohei@fujitsu.com>
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On Wed, May 18, 2022 at 03:30:30PM +0900, Kohei Tarumizu wrote:
> Adds module init/exit code to create sysfs attributes for x86 with
> "hardware_prefetcher_enable", "ip_prefetcher_enable" and
> "adjacent_cache_line_prefetcher_enable".
> 
> This driver works only if a CPU model is mapped to type of register
> specification(e.g. TYPE_L12_BASE) in pfctl_match[].

How will the driver be automatically loaded if this is the case or not?
You can not rely on userspace knowing to load a driver on its own,
please tie into the proper device discovery.

thanks,

greg k-h