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Message-ID: <20210108070211.GC20383@chenyu-office.sh.intel.com>
Date: Fri, 8 Jan 2021 15:02:11 +0800
From: Chen Yu <yu.c.chen@...el.com>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc: Linux PM <linux-pm@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: Re: [PATCH v1 1/3] cpufreq: intel_pstate: Always read hwp_cap_cached
with READ_ONCE()
On Thu, Jan 07, 2021 at 07:42:15PM +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> Because intel_pstate_get_hwp_max() which updates hwp_cap_cached
> may run in parallel with the readers of it, annotate all of the
> read accesses to it with READ_ONCE().
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Tested-by: Chen Yu <yu.c.chen@...el.com>
thanks,
Chenyu
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