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Revision dbf520a9d7d4d5ba28d2947be11e34099a5e3e20 authored by Paul Walmsley on 31 March 2013, 00:04:40 UTC, committed by Linus Torvalds on 31 March 2013, 18:38:33 UTC 
Revert "lockdep: check that no locks held at freeze time"
 
This reverts commit 6aa9707099c4b25700940eb3d016f16c4434360d.

Commit 6aa9707099c4 ("lockdep: check that no locks held at freeze time")
causes problems with NFS root filesystems.  The failures were noticed on
OMAP2 and 3 boards during kernel init:

  [ BUG: swapper/0/1 still has locks held! ]
  3.9.0-rc3-00344-ga937536 #1 Not tainted
  -------------------------------------
  1 lock held by swapper/0/1:
   #0:  (&type->s_umount_key#13/1){+.+.+.}, at: [<c011e84c>] sget+0x248/0x574

  stack backtrace:
    rpc_wait_bit_killable
    __wait_on_bit
    out_of_line_wait_on_bit
    __rpc_execute
    rpc_run_task
    rpc_call_sync
    nfs_proc_get_root
    nfs_get_root
    nfs_fs_mount_common
    nfs_try_mount
    nfs_fs_mount
    mount_fs
    vfs_kern_mount
    do_mount
    sys_mount
    do_mount_root
    mount_root
    prepare_namespace
    kernel_init_freeable
    kernel_init

Although the rootfs mounts, the system is unstable.  Here's a transcript
from a PM test:

  http://www.pwsan.com/omap/testlogs/test_v3.9-rc3/20130317194234/pm/37xxevm/37xxevm_log.txt

Here's what the test log should look like:

  http://www.pwsan.com/omap/testlogs/test_v3.8/20130218214403/pm/37xxevm/37xxevm_log.txt

Mailing list discussion is here:

  http://lkml.org/lkml/2013/3/4/221

Deal with this for v3.9 by reverting the problem commit, until folks can
figure out the right long-term course of action.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Mandeep Singh Baines <msb@chromium.org>
Cc: Jeff Layton <jlayton@redhat.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: <maciej.rutecki@gmail.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ben Chan <benchan@chromium.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 13d2080
Raw File
alsa-driver-api.tmpl 
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
	"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>

<!-- ****************************************************** -->
<!-- Header  -->
<!-- ****************************************************** -->
<book id="ALSA-Driver-API">
  <bookinfo>
    <title>The ALSA Driver API</title>

    <legalnotice>
    <para>
    This document is free; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version. 
    </para>

    <para>
    This document is distributed in the hope that it will be useful,
    but <emphasis>WITHOUT ANY WARRANTY</emphasis>; without even the
    implied warranty of <emphasis>MERCHANTABILITY or FITNESS FOR A
    PARTICULAR PURPOSE</emphasis>. See the GNU General Public License
    for more details.
    </para>

    <para>
    You should have received a copy of the GNU General Public
    License along with this program; if not, write to the Free
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
    MA 02111-1307 USA
    </para>
    </legalnotice>

  </bookinfo>

<toc></toc>

  <chapter><title>Management of Cards and Devices</title>
     <sect1><title>Card Management</title>
!Esound/core/init.c
     </sect1>
     <sect1><title>Device Components</title>
!Esound/core/device.c
     </sect1>
     <sect1><title>Module requests and Device File Entries</title>
!Esound/core/sound.c
     </sect1>
     <sect1><title>Memory Management Helpers</title>
!Esound/core/memory.c
!Esound/core/memalloc.c
     </sect1>
  </chapter>
  <chapter><title>PCM API</title>
     <sect1><title>PCM Core</title>
!Esound/core/pcm.c
!Esound/core/pcm_lib.c
!Esound/core/pcm_native.c
     </sect1>
     <sect1><title>PCM Format Helpers</title>
!Esound/core/pcm_misc.c
     </sect1>
     <sect1><title>PCM Memory Management</title>
!Esound/core/pcm_memory.c
     </sect1>
  </chapter>
  <chapter><title>Control/Mixer API</title>
     <sect1><title>General Control Interface</title>
!Esound/core/control.c
     </sect1>
     <sect1><title>AC97 Codec API</title>
!Esound/pci/ac97/ac97_codec.c
!Esound/pci/ac97/ac97_pcm.c
     </sect1>
     <sect1><title>Virtual Master Control API</title>
!Esound/core/vmaster.c
!Iinclude/sound/control.h
     </sect1>
  </chapter>
  <chapter><title>MIDI API</title>
     <sect1><title>Raw MIDI API</title>
!Esound/core/rawmidi.c
     </sect1>
     <sect1><title>MPU401-UART API</title>
!Esound/drivers/mpu401/mpu401_uart.c
     </sect1>
  </chapter>
  <chapter><title>Proc Info API</title>
     <sect1><title>Proc Info Interface</title>
!Esound/core/info.c
     </sect1>
  </chapter>
  <chapter><title>Miscellaneous Functions</title>
     <sect1><title>Hardware-Dependent Devices API</title>
!Esound/core/hwdep.c
     </sect1>
     <sect1><title>Jack Abstraction Layer API</title>
!Esound/core/jack.c
     </sect1>
     <sect1><title>ISA DMA Helpers</title>
!Esound/core/isadma.c
     </sect1>
     <sect1><title>Other Helper Macros</title>
!Iinclude/sound/core.h
     </sect1>
  </chapter>

</book>
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