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  1. 04 Jul, 2011 1 commit
  3. 25 Jun, 2011 4 commits
  5. 24 Jun, 2011 16 commits
  7. 23 Jun, 2011 14 commits
    • Roland Dreier's avatar
      target: Convert transport_deregister_session_configfs nacl_sess_lock to save irq state · 23388864
      Roland Dreier authored 
      This patch converts transport_deregister_session_configfs() to save/restore
spinlock IRQ state for struct se_node_acl->nacl_sess_lock access as tcm_qla2xxx
logic expects to call transport_deregister_session_configfs() code with
irq save already held for struct qla_hw_data.
Reported-by: default avatarRoland Dreier <roland@purestorage.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      23388864
    • Nicholas Bellinger's avatar
      target: Fix transport_get_lun_for_tmr failure cases · 7fd29aa9
      Nicholas Bellinger authored 
      This patch fixes two possible NULL pointer dereferences in target v4.0
code where se_tmr release path in core_tmr_release_req() can OOPs upon
transport_get_lun_for_tmr() failure by attempting to access se_device or
se_tmr->tmr_list without a valid member of se_device->tmr_list during
transport_free_se_cmd() release.  This patch moves the se_tmr->tmr_dev
pointer assignment in transport_get_lun_for_tmr() until after possible
-ENODEV failures during unpacked_lun lookup.

This addresses an OOPs originally reported with LIO v4.1 upstream on
.39 code here:

    TARGET_CORE[qla2xxx]: Detected NON_EXISTENT_LUN Access for 0x00000000
    BUG: unable to handle kernel NULL pointer dereference at 0000000000000550
    IP: [<ffffffff81035ec4>] __ticket_spin_trylock+0x4/0x20
    PGD 0
    Oops: 0000 [#1] SMP
    last sysfs file: /sys/devices/system/cpu/cpu23/cache/index2/shared_cpu_map
    CPU 1
    Modules linked in: netconsole target_core_pscsi target_core_file
tcm_qla2xxx target_core_iblock tcm_loop target_core_mod configfs
ipmi_devintf ipmi_si ipmi_msghandler serio_raw i7core_edac ioatdma dca
edac_core ps_bdrv ses enclosure usbhid usb_storage ahci qla2xxx hid
uas e1000e mpt2sas libahci mlx4_core scsi_transport_fc
scsi_transport_sas raid_class scsi_tgt [last unloaded: netconsole]

    Pid: 0, comm: kworker/0:0 Tainted: G        W   2.6.39+ #1 Xyratex Storage Server
    RIP: 0010:[<ffffffff81035ec4>] [<ffffffff81035ec4>]__ticket_spin_trylock+0x4/0x20
    RSP: 0018:ffff88063e803c08  EFLAGS: 00010286
    RAX: ffff880619ab45e0 RBX: 0000000000000550 RCX: 0000000000000000
    RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000550
    RBP: ffff88063e803c08 R08: 0000000000000002 R09: 0000000000000000
    R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000568
    R13: 0000000000000001 R14: 0000000000000000 R15: ffff88060cd96a20
    FS:  0000000000000000(0000) GS:ffff88063e800000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    CR2: 0000000000000550 CR3: 0000000001a03000 CR4: 00000000000006e0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    Process kworker/0:0 (pid: 0, threadinfo ffff880619ab8000, task ffff880619ab45e0)
    Stack:
     ffff88063e803c28 ffffffff812cf039 0000000000000550 0000000000000568
     ffff88063e803c58 ffffffff8157071e ffffffffa028a1dc ffff88060f7e4600
     0000000000000550 ffff880616961480 ffff88063e803c78 ffffffffa028a1dc
    Call Trace:
<IRQ>
     [<ffffffff812cf039>] do_raw_spin_trylock+0x19/0x50
     [<ffffffff8157071e>] _raw_spin_lock+0x3e/0x70
     [<ffffffffa028a1dc>] ? core_tmr_release_req+0x2c/0x60 [target_core_mod]
     [<ffffffffa028a1dc>] core_tmr_release_req+0x2c/0x60 [target_core_mod]
     [<ffffffffa028d0d2>] transport_free_se_cmd+0x22/0x50 [target_core_mod]
     [<ffffffffa028d120>] transport_release_cmd_to_pool+0x20/0x40 [target_core_mod]
     [<ffffffffa028e525>] transport_generic_free_cmd+0xa5/0xb0 [target_core_mod]
     [<ffffffffa0147cc4>] tcm_qla2xxx_handle_tmr+0xc4/0xd0 [tcm_qla2xxx]
     [<ffffffffa0191ba3>] __qla24xx_handle_abts+0xd3/0x150 [qla2xxx]
     [<ffffffffa0197651>] qla_tgt_response_pkt+0x171/0x520 [qla2xxx]
     [<ffffffffa0197a2d>] qla_tgt_response_pkt_all_vps+0x2d/0x220 [qla2xxx]
     [<ffffffffa0171dd3>] qla24xx_process_response_queue+0x1a3/0x670 [qla2xxx]
     [<ffffffffa0196281>] ? qla24xx_atio_pkt+0x81/0x120 [qla2xxx]
     [<ffffffffa0174025>] ? qla24xx_msix_default+0x45/0x2a0 [qla2xxx]
     [<ffffffffa0174198>] qla24xx_msix_default+0x1b8/0x2a0 [qla2xxx]
     [<ffffffff810dadb4>] handle_irq_event_percpu+0x54/0x210
     [<ffffffff810dafb8>] handle_irq_event+0x48/0x70
     [<ffffffff810dd5ee>] ? handle_edge_irq+0x1e/0x110
     [<ffffffff810dd647>] handle_edge_irq+0x77/0x110
     [<ffffffff8100d362>] handle_irq+0x22/0x40
     [<ffffffff8157b28d>] do_IRQ+0x5d/0xe0
     [<ffffffff81571413>] common_interrupt+0x13/0x13
<EOI>
     [<ffffffff813003f7>] ? intel_idle+0xd7/0x130
     [<ffffffff813003f0>] ? intel_idle+0xd0/0x130
     [<ffffffff8144832b>] cpuidle_idle_call+0xab/0x1c0
     [<ffffffff8100a26b>] cpu_idle+0xab/0xf0
     [<ffffffff81566c59>] start_secondary+0x1cb/0x1d2
Reported-by: default avatarRoland Dreier <roland@purestorage.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      7fd29aa9
    • Nishanth Aravamudan's avatar
      libata/sas: only set FROZEN flag if new EH is supported · 3f1e046a
      Nishanth Aravamudan authored 
      On 16.06.2011 [08:28:39 -0500], Brian King wrote:
> On 06/16/2011 02:51 AM, Tejun Heo wrote:
> > On Wed, Jun 15, 2011 at 04:34:17PM -0700, Nishanth Aravamudan wrote:
> >>> That looks like the right thing to do. For ipr's usage of
> >>> libata, we don't have the concept of a port frozen state, so this flag
> >>> should really never get set. The alternate way to fix this would be to
> >>> only set ATA_PFLAG_FROZEN in ata_port_alloc if ap->ops->error_handler
> >>> is not NULL.
> >>
> >> It seemed like ipr is as you say, but I wasn't sure if it was
> >> appropriate to make the change above in the common libata-scis code or
> >> not. I don't want to break some other device on accident.
> >>
> >> Also, I tried your suggestion, but I don't think that can happen in
> >> ata_port_alloc? ata_port_alloc is allocated ap itself, and it seems like
> >> ap->ops typically gets set only after ata_port_alloc returns?
> >
> > Maybe we can test error_handler in ata_sas_port_start()?
>
> Good point. Since libsas is converted to the new eh now, we would need to have
> this test.

Commit 7b3a24c5 ("ahci: don't enable
port irq before handler is registered") caused a regression for CD-ROMs
attached to the IPR SATA bus on Power machines:

  ata_port_alloc: ENTER
  ata_port_probe: ata1: bus probe begin
  ata1.00: ata_dev_read_id: ENTER
  ata1.00: failed to IDENTIFY (I/O error, err_mask=0x40)
  ata1.00: ata_dev_read_id: ENTER
  ata1.00: failed to IDENTIFY (I/O error, err_mask=0x40)
  ata1.00: limiting speed to UDMA7:PIO5
  ata1.00: ata_dev_read_id: ENTER
  ata1.00: failed to IDENTIFY (I/O error, err_mask=0x40)
  ata1.00: disabled
  ata_port_probe: ata1: bus probe end
  scsi_alloc_sdev: Allocation failure during SCSI scanning, some SCSI devices might not be configured

The FROZEN flag added in that commit is only cleared by the new EH code,
which is not used by ipr. Clear this flag in the SAS code if we don't
support new EH.
Reported-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarNishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@pobox.com>
      3f1e046a
    • Tejun Heo's avatar
      libata: apply NOSETXFER horkage to the affected Pioneer drives · cd691876
      Tejun Heo authored 
      regardless of firmware revision

It's unlikely NOSETXFER works for a revision of drive but doesn't for
another and pioneer doesn't seem to be fixing firmwares for the
affected drives.  Apply NOSETXFER to the affected pioneer drives
regardless of firmware revision.

  http://article.gmane.org/gmane.linux.ide/49734Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Reported-by: fl-00@gmx.de
Signed-off-by: default avatarJeff Garzik <jgarzik@pobox.com>
      cd691876
    • Justin P. Mattock's avatar
      drivers/ata/sata_dwc_460ex: Fix typo 'corrresponding' · 8618ccd3
      Justin P. Mattock authored 
      The patch below fixes a typo.
Signed-off-by: default avatarJustin P. Mattock <justinmattock@gmail.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@pobox.com>
      8618ccd3
    • Nicholas Bellinger's avatar
      Merge tag 'v3.0-rc4' of /pub/scm/linux/kernel/git/torvalds/linux-2.6 into for-linus · 74d83b7e
      Nicholas Bellinger authored
      74d83b7e
    • Jeff Layton's avatar
      cifs: fix wsize negotiation to respect max buffer size and active signing (try #4) · 1190f6a0
      Jeff Layton authored 
      Hopefully last version. Base signing check on CAP_UNIX instead of
tcon->unix_ext, also clean up the comments a bit more.

According to Hongwei Sun's blog posting here:

    http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx

CAP_LARGE_WRITEX is ignored when signing is active. Also, the maximum
size for a write without CAP_LARGE_WRITEX should be the maxBuf that
the server sent in the NEGOTIATE request.

Fix the wsize negotiation to take this into account. While we're at it,
alter the other wsize definitions to use sizeof(WRITE_REQ) to allow for
slightly larger amounts of data to potentially be written per request.
Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
      1190f6a0
    • Russell King's avatar
      Fix CPU spinlock lockups on secondary CPU bringup · 1b19ca9f
      Russell King authored 
      Secondary CPU bringup typically calls calibrate_delay() during its
initialization.  However, calibrate_delay() modifies a global variable
(loops_per_jiffy) used for udelay() and __delay().

A side effect of 71c696b1 ("calibrate: extract fall-back calculation
into own helper") introduced in the 2.6.39 merge window means that we
end up with a substantial period where loops_per_jiffy is zero.  This
causes the spinlock debugging code to malfunction:

	u64 loops = loops_per_jiffy * HZ;
	for (;;) {
		for (i = 0; i < loops; i++) {
			if (arch_spin_trylock(&lock->raw_lock))
				return;
			__delay(1);
		}
		...
	}

by never calling arch_spin_trylock() - resulting in the CPU locking
up in an infinite loop inside __spin_lock_debug().

Work around this by only writing to loops_per_jiffy only once we have
completed all the calibration decisions.
Tested-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
Cc: <stable@kernel.org> (2.6.39-stable)
--
Better solutions (such as omitting the calibration for secondary CPUs,
or arranging for calibrate_delay() to return the LPJ value and leave
it to the caller to decide where to store it) are a possibility, but
would be much more invasive into each architecture.

I think this is the best solution for -rc and stable, but it should be
revisited for the next merge window.

 init/calibrate.c |   14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1b19ca9f
    • Mika Westerberg's avatar
      serial: mrst_max3110: initialize waitqueue earlier · 33b1e693
      Mika Westerberg authored 
      The driver went to initialize its waitqueue at the start of the main
processing thread.  However, it is possible that this thread is not
scheduled on a CPU before the write function is called which leads to a
following error:

  BUG: spinlock bad magic on CPU#1, swapper/1
   lock: f5f3ebdc, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
  Pid: 1, comm: swapper Not tainted 3.0.0-rc2+ #67
  Call Trace:
   [<c1289663>] spin_bug+0xa3/0xf0
   [<c12897ad>] do_raw_spin_lock+0x7d/0x150
   [<c14963de>] _raw_spin_lock_irqsave+0x4e/0x60
   [<c102f2bb>] __wake_up+0x1b/0x50
   [<c12d3715>] serial_m3110_con_write+0x55/0x60
   [<c1041575>] __call_console_drivers+0x75/0x90
   [<c10415d9>] _call_console_drivers+0x49/0x80
   [<c1041baa>] console_unlock+0xca/0x1f0
   [<c10420ef>] vprintk+0x18f/0x4f0
   [<c14928a3>] printk+0x18/0x1a
   [<c1042730>] register_console+0x2e0/0x350
   [<c12d098e>] uart_add_one_port+0x33e/0x3d0
   [<c1485ba6>] serial_m3110_probe+0x1c2/0x1df
   [<c1303db7>] spi_drv_probe+0x17/0x20
   ...

Fix this by initializing the waitqueue before the main thread is
created.
Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      33b1e693
    • William Douglas's avatar
      mrst_max3110: Change max missing message priority. · 0bb04bf3
      William Douglas authored 
      Change print message to notice instead of error to clean up non critical
messages showing on startup.  The MAX3111 not being present is a normal
path for end user systems.
Signed-off-by: default avatarWilliam Douglas <william.douglas@intel.com>
[rebased on 3.0, switched to dev_dbg()]
Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0bb04bf3
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6 · bccaeafd
      Linus Torvalds authored 
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6:
  jfs: agstart field must be 64 bits
  JFS: Don't save agno in the inode
  jfs: Update agstart when resizing volume
  jfs: old_agsize should be 64 bits in jfs_extendfs
      bccaeafd
    • Linus Torvalds's avatar
      Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6 · 68d0080f
      Linus Torvalds authored 
      * 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PCI / PM: Block races between runtime PM and system sleep
  PM / Domains: Update documentation
  PM / Runtime: Handle clocks correctly if CONFIG_PM_RUNTIME is unset
  PM: Fix async resume following suspend failure
  PM: Free memory bitmaps if opening /dev/snapshot fails
  PM: Rename dev_pm_info.in_suspend to is_prepared
  PM: Update documentation regarding sysdevs
  PM / Runtime: Update doc: usage count no longer incremented across system PM
      68d0080f
    • David Rientjes's avatar
      mm, hotplug: protect zonelist building with zonelists_mutex · f957db4f
      David Rientjes authored 
      Commit 959ecc48 ("mm/memory_hotplug.c: fix building of node hotplug
zonelist") does not protect the build_all_zonelists() call with
zonelists_mutex as needed.  This can lead to races in constructing
zonelist ordering if a concurrent build is underway.  Protecting this
with lock_memory_hotplug() is insufficient since zonelists can be
rebuild though sysfs as well.
Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
Reviewed-by: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      f957db4f
    • David Rientjes's avatar
      mm, hotplug: fix error handling in mem_online_node() · 7553e8f2
      David Rientjes authored 
      The error handling in mem_online_node() is incorrect: hotadd_new_pgdat()
returns NULL if the new pgdat could not have been allocated and a pointer
to it otherwise.

mem_online_node() should fail if hotadd_new_pgdat() fails, not the
inverse.  This fixes an issue when memoryless nodes are not onlined and
their sysfs interface is not registered when their first cpu is brought
up.

The bug was introduced by commit cf23422b ("cpu/mem hotplug: enable
CPUs online before local memory online") iow v2.6.35.
Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
Reviewed-by: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: stable@kernel.org
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      7553e8f2
  9. 22 Jun, 2011 4 commits
    • Pavel Shilovsky's avatar
      CIFS: Fix problem with 3.0-rc1 null user mount failure · 446b23a7
      Pavel Shilovsky authored 
      Figured it out: it was broken by b946845a commit - "cifs: cifs_parse_mount_options: do not tokenize mount options in-place". So, as a quick fix I suggest to apply this patch.

[PATCH] CIFS: Fix kfree() with constant string in a null user case
Signed-off-by: default avatarPavel Shilovsky <piastryyy@gmail.com>
Reviewed-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
      446b23a7
    • David Howells's avatar
      KEYS: Fix error handling in construct_key_and_link() · b1d7dd80
      David Howells authored 
      Fix error handling in construct_key_and_link().

If construct_alloc_key() returns an error, it shouldn't pass out through
the normal path as the key_serial() called by the kleave() statement
will oops when it gets an error code in the pointer:

  BUG: unable to handle kernel paging request at ffffffffffffff84
  IP: [<ffffffff8120b401>] request_key_and_link+0x4d7/0x52f
  ..
  Call Trace:
   [<ffffffff8120b52c>] request_key+0x41/0x75
   [<ffffffffa00ed6e8>] cifs_get_spnego_key+0x206/0x226 [cifs]
   [<ffffffffa00eb0c9>] CIFS_SessSetup+0x511/0x1234 [cifs]
   [<ffffffffa00d9799>] cifs_setup_session+0x90/0x1ae [cifs]
   [<ffffffffa00d9c02>] cifs_get_smb_ses+0x34b/0x40f [cifs]
   [<ffffffffa00d9e05>] cifs_mount+0x13f/0x504 [cifs]
   [<ffffffffa00caabb>] cifs_do_mount+0xc4/0x672 [cifs]
   [<ffffffff8113ae8c>] mount_fs+0x69/0x155
   [<ffffffff8114ff0e>] vfs_kern_mount+0x63/0xa0
   [<ffffffff81150be2>] do_kern_mount+0x4d/0xdf
   [<ffffffff81152278>] do_mount+0x63c/0x69f
   [<ffffffff8115255c>] sys_mount+0x88/0xc2
   [<ffffffff814fbdc2>] system_call_fastpath+0x16/0x1b
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Acked-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b1d7dd80
    • David Howells's avatar
      MN10300: asm/uaccess.h needs to #include linux/kernel.h for might_sleep() · 35052cff
      David Howells authored 
      MN10300's asm/uaccess.h needs to #include linux/kernel.h to get might_sleep()
otherwise it fails to build on MN10300 allyesconfig.  This fails in a few
places with messages like the following:

  In file included from security/keys/trusted.c:14:
  include/linux/uaccess.h: In function '__copy_from_user_nocache':
  include/linux/uaccess.h:52: error: implicit declaration of function 'might_sleep'
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      35052cff
    • Linus Torvalds's avatar
      Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6 · 2992c4bd
      Linus Torvalds authored 
      * 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
  NFS: Fix decode_secinfo_maxsz
  NFSv4.1: Fix an off-by-one error in pnfs_generic_pg_test
  NFSv4.1: Fix some issues with pnfs_generic_pg_test
  NFSv4.1: file layout must consider pg_bsize for coalescing
  pnfs-obj: No longer needed to take an extra ref at add_device
  SUNRPC: Ensure the RPC client only quits on fatal signals
  NFSv4: Fix a readdir regression
  nfs4.1: mark layout as bad on error path in _pnfs_return_layout
  nfs4.1: prevent race that allowed use of freed layout in _pnfs_return_layout
  NFSv4.1: need to put_layout_hdr on _pnfs_return_layout error path
  NFS: (d)printks should use %zd for ssize_t arguments
  NFSv4.1: fix break condition in pnfs_find_lseg
  nfs4.1: fix several problems with _pnfs_return_layout
  NFSv4.1: allow zero fh array in filelayout decode layout
  NFSv4.1: allow nfs_fhget to succeed with mounted on fileid
  NFSv4.1: Fix a refcounting issue in the pNFS device id cache
  NFSv4.1: deprecate headerpadsz in CREATE_SESSION
  NFS41: do not update isize if inode needs layoutcommit
  NLM: Don't hang forever on NLM unlock requests
  NFS: fix umount of pnfs filesystems
      2992c4bd
  11. 21 Jun, 2011 1 commit
    • Rafael J. Wysocki's avatar
      PCI / PM: Block races between runtime PM and system sleep · a5f76d5e
      Rafael J. Wysocki authored 
      After commit e8665002
(PM: Allow pm_runtime_suspend() to succeed during system suspend) it
is possible that a device resumed by the pm_runtime_resume(dev) in
pci_pm_prepare() will be suspended immediately from a work item,
timer function or otherwise, defeating the very purpose of calling
pm_runtime_resume(dev) from there.  To prevent that from happening
it is necessary to increment the runtime PM usage counter of the
device by replacing pm_runtime_resume() with pm_runtime_get_sync().
Moreover, the incremented runtime PM usage counter has to be
decremented by the corresponding pci_pm_complete(), via
pm_runtime_put_sync().
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
Cc: stable@kernel.org
Acked-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
      a5f76d5e
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