linux-kernel - Re: [GIT PULL] More ACPI updates for v4.10-rc1

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Date:   Wed, 4 Jan 2017 15:46:47 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Lv Zheng <lv.zheng@...el.com>, Bob Moore <robert.moore@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: [GIT PULL] More ACPI updates for v4.10-rc1

On Wed, Jan 4, 2017 at 3:19 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> This is my normal desktop, so pretty plain HW.
>
> It doesn't happen on my laptop, so it's obviously hw-related or
> possibly config-related.

.. and here's the stack trace.

Side note: should the '\n' be deleted? ACPI_ERROR() seems to add that
silly "where it happened" at the end, but due to the '\n' we end up
with two lines...

                  Linus

---

  ACPI Warning: Table ffffffffb0e6c0a0, Validation count is zero
before decrement
   (20160930/tbutils-456)
  ------------[ cut here ]------------
  WARNING: CPU: 0 PID: 0 at drivers/acpi/acpica/tbutils.c:457
acpi_tb_put_table+0x4e/0x62
  Modules linked in:
  CPU: 0 PID: 0 Comm: swapper Not tainted
4.10.0-rc2-00103-g4cf184638bcf-dirty #1
  Hardware name: System manufacturer System Product Name/Z170-K, BIOS
1803 05/06/2016
  Call Trace:
     acpi_tb_put_table+0x4e/0x62
     acpi_put_table+0x40/0x4d
     detect_intel_iommu+0x9d/0xed
     pci_iommu_alloc+0x50/0x6c
     mem_init+0xf/0x8a
     start_kernel+0x21e/0x454
     x86_64_start_reservations+0x24/0x26
     x86_64_start_kernel+0x182/0x193
     start_cpu+0x14/0x14
    ---[ end trace 5e897a808e950ddc ]---