linux-kernel - Re: Linux 2.6.34-rc3

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Date:	Tue, 30 Mar 2010 14:17:51 -0500
From:	Larry Finger <Larry.Finger@...inger.net>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.34-rc3

Remember our old friend? See also
http://lkml.indiana.edu/hypermail/linux/kernel/1003.1/02769.html and a long
related discussion at
http://lkml.indiana.edu/hypermail/linux/kernel/1003.1/02772.html.

BUG: key ffff8800374d2660 not in .data!
------------[ cut here ]------------
WARNING: at kernel/lockdep.c:2706 lockdep_init_map+0x236/0x5d0()
Hardware name: HP Pavilion dv2700 Notebook PC
Modules linked in: processor(+) ide_pci_generic amd74xx ide_core thermal
Pid: 612, comm: modprobe Not tainted 2.6.34-rc3-Linus #192
Call Trace:
 [<ffffffff81046168>] warn_slowpath_common+0x78/0xb0
 [<ffffffff810461af>] warn_slowpath_null+0xf/0x20
 [<ffffffff810772c6>] lockdep_init_map+0x236/0x5d0
 [<ffffffff811649aa>] sysfs_add_file_mode+0x6a/0xc0
 [<ffffffff811acaa0>] ? sprintf+0x40/0x50
 [<ffffffff81164a0c>] sysfs_add_file+0xc/0x10
 [<ffffffff81164ae1>] sysfs_create_file+0x21/0x30
 [<ffffffff81247cc4>] device_create_file+0x14/0x20
 [<ffffffff8126d7d4>] thermal_zone_bind_cooling_device+0x1c4/0x310
-- dump truncated here --

I understand that you do not want a whole set of such "fix one such bug at a
time" patches, but the bottom line is that these lockdep warnings for known
problems interfere with "normal" debugging because further lockdep checking is
disabled. I do not feel qualified to detect other cases and fix them. Only when
a warning hits my logs am I qualified to fix and test.

Larry

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