linux-kernel - Re: [PATCH v11 4/4] firmware: ti_sci: add CPU latency constraint management

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240903124540.73cdhsf755lyfisa@tartness>
Date: Tue, 3 Sep 2024 07:45:40 -0500
From: Nishanth Menon <nm@...com>
To: Nathan Chancellor <nathan@...nel.org>
CC: Markus Schneider-Pargmann <msp@...libre.com>,
        Tero Kristo
	<kristo@...nel.org>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Vibhore Vardhan
	<vibhore@...com>, Kevin Hilman <khilman@...libre.com>,
        Dhruva Gole
	<d-gole@...com>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v11 4/4] firmware: ti_sci: add CPU latency constraint
 management

On 17:54-20240902, Nathan Chancellor wrote:
[...]

> > @@ -3669,7 +3671,27 @@ static int ti_sci_prepare_system_suspend(struct ti_sci_info *info)
> >  static int __maybe_unused ti_sci_suspend(struct device *dev)
> >  {
> >  	struct ti_sci_info *info = dev_get_drvdata(dev);
> > -	int ret;
> > +	struct device *cpu_dev, *cpu_dev_max = NULL;
> > +	s32 val, cpu_lat = 0;
> > +	int i, ret;
> > +
> > +	if (info->fw_caps & MSG_FLAG_CAPS_LPM_DM_MANAGED) {
> > +		for_each_possible_cpu(i) {
> > +			cpu_dev = get_cpu_device(i);
> > +			val = dev_pm_qos_read_value(cpu_dev, DEV_PM_QOS_RESUME_LATENCY);
> 
> This change is now in -next as commit 458d22d2e064 ("firmware: ti_sci:
> add CPU latency constraint management"), where it breaks the build
> when this driver is built as a module because dev_pm_qos_read_value() is
> not exported to modules:
> 
>   ERROR: modpost: "dev_pm_qos_read_value" [drivers/firmware/ti_sci.ko] undefined!
> 
> Obviously exporting it would fix the build but sometimes that is
> controversial, hence just the report.

Thank you for the report. I will drop the series from my queue for now.
That should give us some time to sort things out properly for the next
window.

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D