linux-kernel - WARNING at tty_buffer.c:428 process_one

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Date:	Fri, 01 Mar 2013 16:47:11 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	gregkh@...uxfoundation.org
CC:	linux-kernel@...r.kernel.org, jslaby@...e.cz
Subject: WARNING at tty_buffer.c:428 process_one_work()


I'm getting these non-stop right when the hypervisor console registers
on sparc64, and the machine won't boot up properly.  This is with
Linus's current tree.

[511865.556835] console [ttyHV0] enabled
[511865.564555] ------------[ cut here ]------------
[511865.612410] WARNING: at drivers/tty/tty_buffer.c:428 process_one_work+0x164/0x420()
[511865.627846] tty is NULL
[511865.687052] Modules linked in:
[511865.693305] Call Trace:
[511865.698343]  [0000000000464f2c] warn_slowpath_fmt+0x2c/0x40
[511865.709637]  [0000000000480f24] process_one_work+0x164/0x420
[511865.721097]  [0000000000481580] worker_thread+0x120/0x440
[511865.732036]  [00000000004867a8] kthread+0x88/0xa0
[511865.741585]  [0000000000406044] ret_from_syscall+0x1c/0x2c
[511865.752695]  [0000000000000000]           (null)
[511865.762080] ---[ end trace 40d7a6b076cabd64 ]---
[511865.771806] ------------[ cut here ]------------
[511865.780935] WARNING: at drivers/tty/tty_buffer.c:428 process_one_work+0x164/0x420()
[511865.796379] tty is NULL
[511865.801409] Modules linked in:
[511865.807649] Call Trace:
[511865.812689]  [0000000000464f2c] warn_slowpath_fmt+0x2c/0x40
[511865.823981]  [0000000000480f24] process_one_work+0x164/0x420
[511865.835447]  [0000000000481580] worker_thread+0x120/0x440
[511865.846385]  [00000000004867a8] kthread+0x88/0xa0
[511865.855930]  [0000000000406044] ret_from_syscall+0x1c/0x2c
[511865.867042]  [0000000000000000]           (null)
[511865.876414] ---[ end trace 40d7a6b076cabd65 ]---
[511865.886157] ------------[ cut here ]------------
[511865.895284] WARNING: at drivers/tty/tty_buffer.c:428 process_one_work+0x164/0x420()
[511865.910730] tty is NULL
[511865.915757] Modules linked in:
[511865.922000] Call Trace:
[511865.927035]  [0000000000464f2c] warn_slowpath_fmt+0x2c/0x40
[511865.938330]  [0000000000480f24] process_one_work+0x164/0x420
[511865.949796]  [0000000000481580] worker_thread+0x120/0x440
[511865.960733]  [00000000004867a8] kthread+0x88/0xa0
[511865.970288]  [0000000000406044] ret_from_syscall+0x1c/0x2c
[511865.981402]  [0000000000000000]           (null)
[511865.990773] ---[ end trace 40d7a6b076cabd66 ]---
[511866.000507] ------------[ cut here ]------------
[511866.009618] WARNING: at drivers/tty/tty_buffer.c:428 process_one_work+0x164/0x420()
[511866.025074] tty is NULL
[511866.030102] Modules linked in:
[511866.036361] Call Trace:
[511866.041400]  [0000000000464f2c] warn_slowpath_fmt+0x2c/0x40
[511866.052675]  [0000000000480f24] process_one_work+0x164/0x420
[511866.064147]  [0000000000481580] worker_thread+0x120/0x440
[511866.075077]  [00000000004867a8] kthread+0x88/0xa0
[511866.084639]  [0000000000406044] ret_from_syscall+0x1c/0x2c
[511866.095739]  [0000000000000000]           (null)
[511866.105123] ---[ end trace 40d7a6b076cabd67 ]---
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