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From:   "Rafael J. Wysocki" <rafael@kernel.org>
Date:   Tue, 7 May 2019 10:34:56 +0200
Message-ID: <CAJZ5v0ghNMPMdc03T-is-=-k11rZ8K5O9Av+TnbBY_2mNr-eug@mail.gmail.com>
Subject: Re: [Kernel 5.1] ACPI_DEBUG messages without CONFIG_ACPI_DEBUG being set
To:     Gabriel C <nix.or.die@gmail.com>
Cc:     "Rafael J. Wysocki" <rafael@kernel.org>,
        ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        "Schmauss, Erik" <erik.schmauss@intel.com>
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On Tue, May 7, 2019 at 9:31 AM Gabriel C <nix.or.die@gmail.com> wrote:
>
> Am Di., 7. Mai 2019 um 09:01 Uhr schrieb Rafael J. Wysocki <rafael@kernel.org>:
> >
>  Hello Rafael ,  Erik
>
> > +Erik
> >
> > On Tue, May 7, 2019 at 1:33 AM Gabriel C <nix.or.die@gmail.com> wrote:
> > >
> > > Hello,
> > >
> > > while testing kernel-5.1 I get on one of my Lenovo Laptops very
> > > strange 'ACPI Debug:' messages.
> > >
> > > After some grepping I realized these are Debug messages from DSDT ,
> > > however my kernel does
> > > not have ACPI_DEBUG enabled.
> > >
> > > I found out the module triggering this, on this Laptop is
> > > ideapad_laptop , but looking at the code
> > > I cannot see what would causes that.
> > >
> > > Also on the same Laptop with any 5.0.X kernels I cannot see these.
> > >
> > >
> > > ~$ grep -i ACPI_DEBUG /boot/config-5.1-fw1
> > > # CONFIG_ACPI_DEBUGGER is not set
> > > # CONFIG_ACPI_DEBUG is not set
> > > # CONFIG_THINKPAD_ACPI_DEBUGFACILITIES is not set
> > > # CONFIG_THINKPAD_ACPI_DEBUG is not set
> > >
> > > .. dmesg ..
> > > ...
> > > [   68.020812] calling  ideapad_acpi_driver_init+0x0/0x1000
> > > [ideapad_laptop] @ 1322
> > > [   68.026708] input: Ideapad extra buttons as
> > > /devices/pci0000:00/0000:00:1f.0/PNP0C09:00/VPC2004:00/input/input16
> > > [   68.038236] ACPI Debug:  "=====QUERY_64====="
> > > [   68.050232] ACPI Debug:  "=====QUERY_65====="
> > > [   68.060218] ACPI Debug:  "=====QUERY_64====="
> > > [   68.092216] probe of VPC2004:00 returned 1 after 71386 usecs
> > > [   68.092245] initcall ideapad_acpi_driver_init+0x0/0x1000
> > > [ideapad_laptop] returned 0 after 69751 usecssg
> > >
> > > ...
> > >
> > > These =====QUERY_XX===== messages are from DSDT:
> > >
> > > ~/acpi$ grep QUERY dsdt.dsl
> > >                Debug = "=====QUERY_11====="
> > >                Debug = "=====QUERY_12====="
> > >                Debug = "=====QUERY_24====="
> > >                Debug = "=====QUERY_25====="
> > >                Debug = "=====QUERY_37====="
> > >                Debug = "=====QUERY_38====="
> > >                Debug = "=====QUERY_64====="
> > >                Debug = "=====QUERY_65====="
> > >
> > > Also this is the code from DSDT for QUERY 64 and 65:
> > >
> > > ...
> > >             Method (_Q64, 0, NotSerialized)  // _Qxx: EC Query
> > >            {
> > >                Debug = "=====QUERY_64====="
> > >                If ((OSYS == 0x07D9))
> > >                {
> > >                    If (((WLEX == One) & (WLAT == One)))
> > >                    {
> > >                        SGOV (0x02040005, One)
> > >                    }
> > >                    Else
> > >                    {
> > >                        SGOV (0x02040005, Zero)
> > >                    }
> > >                }
> > >            }
> > >
> > >            Method (_Q65, 0, NotSerialized)  // _Qxx: EC Query
> > >            {
> > >                Debug = "=====QUERY_65====="
> > >                If ((OSYS == 0x07D9))
> > >                {
> > >                    If (((BTEX == One) & (BTAT == One)))
> > >                    {
> > >                        SGOV (0x0202000B, One)
> > >                    }
> > >                    Else
> > >                    {
> > >                        SGOV (0x0202000B, Zero)
> > >                    }
> > >                }
> > >            }
> > >
> > > ...
> > >
> > >
> > > Any idea what would cause this ?
>
> I think I found what is causing that.
>
> Commit aa9aaa4d61c0048d3faad056893cd7860bbc084c is moving
> definition of Linux's  ACPI_DEBUG_DEFAULT to incude/acpi/platform/aclinux.h ,
> however include/acpi/acpi.h didn't got updated and  ACPI_DEBUG_DEFAULT now
> being always defined as  (ACPI_LV_INIT | ACPI_LV_DEBUG_OBJECT |
> ACPI_LV_EVALUATION | ACPI_LV_REPAIR)

I'm not sure what you mean by this.

include/acpi/acpi.h should get the right definitions through
include/acpi/platform/acenv.h and include/acpi/acoutput.h that are
included by it.

It looks like incude/acpi/platform/aclinux.h has not been included by
include/acpi/platform/acenv.h for some reason when building this
module.