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Subject: Re: linux-next: Tree for Jul 7 (scsi/lpfc/lpfc_init.c)
To:     Randy Dunlap <rdunlap@infradead.org>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Linux Next Mailing List <linux-next@vger.kernel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-scsi <linux-scsi@vger.kernel.org>,
        dick kennedy <dick.kennedy@broadcom.com>
References: <20200707180800.549b561b@canb.auug.org.au>
 <2f85f3c4-a58b-f225-a533-86e209a4651c@infradead.org>
From:   James Smart <james.smart@broadcom.com>
Message-ID: <7ae1c7e3-ce8d-836b-1ae7-d4d00bd8f95c@broadcom.com>
Date:   Tue, 7 Jul 2020 11:12:00 -0700
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On 7/7/2020 10:09 AM, Randy Dunlap wrote:
> On 7/7/20 1:08 AM, Stephen Rothwell wrote:
>> Hi all,
>>
>> Changes since 20200706:
>>
> on i386:
>
> when CONFIG_ACPI is not set/enabled:
>
>
> ../drivers/scsi/lpfc/lpfc_init.c:1265:15: error: implicit declaration of function 'get_cpu_idle_time'; did you mean 'get_cpu_device'? [-Werror=implicit-function-declaration]
>
>
> The cpufreq people want justification for using
> get_cpu_idle_time().  Please see
> https://lore.kernel.org/linux-scsi/20200707030943.xkocccy6qy2c3hrx@vireshk-i7/
>
>
>

The driver is using cpu utilization in order to choose between softirq 
or work queues in handling an interrupt. Less-utilized, softirq is used. 
higher utilized, work queue is used.? The utilization is checked 
periodically via a heartbeat.

-- james