linux-kernel - Re: [PATCH] acpi, spcr: Make SPCR available to x86

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Message-ID: <5fab980d-d937-8806-9745-9850947a9096@redhat.com>
Date:   Tue, 23 Jan 2018 07:41:56 -0500
From:   Prarit Bhargava <prarit@...hat.com>
To:     Timur Tabi <timur@...eaurora.org>, linux-kernel@...r.kernel.org
Cc:     linux-acpi@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
        linux-serial@...r.kernel.org, Bhupesh Sharma <bhsharma@...hat.com>,
        Lv Zheng <lv.zheng@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Jonathan Corbet <corbet@....net>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>, graeme.gregory@...aro.org,
        mark.salter@...hat.com
Subject: Re: [PATCH] acpi, spcr: Make SPCR available to x86



On 01/22/2018 04:49 PM, Timur Tabi wrote:
> On 01/18/2018 09:09 AM, Prarit Bhargava wrote:
>>       if (acpi_disabled) {
>> -        if (earlycon_init_is_deferred)
>> +        if (earlycon_acpi_spcr_enable)
> 
> This patch works for me, so I can ACK it, but first you might want to rename
> earlycon_acpi_spcr_enable, because these two lines don't make much sense.
> 
> "If ACPI is disabled, and ACPI SCPR is enabled, then ...."
> 
> If ACPI is disabled, then how can a variable called "earlycon_acpi_spcr_enable"
> be true?
> 
> Would it make more sense to rename it to earlycon_spcr_enable?
> 

acpi_disabled is a global runtime flag that can be set via "acpi=off" on the
command line.  It does not disable the tables, only the reading and interpreting
of the data in the tables.

P.