Re: [Kernel 5.1] ACPI_DEBUG messages without CONFIG_ACPI_DEBUG being set

[Gabriel C <nix.or.die@gmail.com>]

Am Di., 7. Mai 2019 um 20:46 Uhr schrieb Schmauss, Erik
<erik.schmauss@intel.com>:
>
>
>
> > -----Original Message-----
> > From: Gabriel C [mailto:nix.or.die@gmail.com]
> > Sent: Tuesday, May 7, 2019 2:33 AM
> > To: Rafael J. Wysocki <rafael@kernel.org>
> > Cc: ACPI Devel Maling List <linux-acpi@vger.kernel.org>; LKML <linux-
> > kernel@vger.kernel.org>; Schmauss, Erik <erik.schmauss@intel.com>
> > Subject: Re: [Kernel 5.1] ACPI_DEBUG messages without
> > CONFIG_ACPI_DEBUG being set
> >
> > Am Di., 7. Mai 2019 um 10:35 Uhr schrieb Rafael J. Wysocki
> > <rafael@kernel.org>:
> > >
> > > 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.
> > >
> >
> > Hmm yes should , I missed that include. However it does not work.
> >
> > I've just put back old code back into drivers/acpi/bus.c to test and all working
> > now fine without any other changes.
> >
> > > 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.
> >
> > If this one getting it wrong all will do so , they all just include <linux/acpi.h>.
> >
> > Probably not so much users will notice that , I just did because my BIOS
> > vendor forgot DEBUG around.
>
> Do you still get this issue after doing make clean and rebuilding your kernel?

A clean build from tarball has this issue for me. I don't think is a
building problem ,
any <5.1 kernel is fine , kernel 5.1 with your commit reverted is fine too ,
kernel 5.1 with your commit in but the removed hunk in bus.c re-added
is fine also.