linux-kernel - Re: sysfs lockdep complaint

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Date:	Sat, 20 Feb 2010 23:31:01 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	Américo Wang <xiyou.wangcong@...il.com>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: sysfs lockdep complaint

On Sat, Feb 20, 2010 at 04:14:58PM +0100, Johannes Berg wrote:
>On Sat, 2010-02-20 at 23:03 +0800, Américo Wang wrote:
>
>> This should be fixed by the following patch, it is based on the
>> 4 patches from Eric.
>
>Thanks, one down.
>
>[    1.556276] windfarm: initializing for dual-core desktop G5
>[    1.822554] BUG: key 6b6b6b6b6b6b6b6b not in .data!
>[    1.827044] ------------[ cut here ]------------
>[    1.831498] Badness at kernel/lockdep.c:2706
>[    1.836013] NIP: c0000000000b6a3c LR: c0000000000b6a20 CTR: 0000000000000000
>[    1.840721] REGS: c0000002161976a0 TRAP: 0700   Not tainted  (2.6.33-rc8-00140-g4ec62b2-dirty)
>[    1.845620] MSR: 9000000000029032 <EE,ME,CE,IR,DR>  CR: 24000022  XER: 000fffff
>[    1.850679] TASK = c000000216198000[1] 'swapper' THREAD: c000000216194000 CPU: 1
>[    1.850884] GPR00: 0000000000000000 c000000216197920 c000000000b10328 0000000000000001 
>[    1.856050] GPR04: 0000000000000001 c000000000070d0c 0000000000000000 0000000000000002 
>[    1.861327] GPR08: 0000000000000000 c0000000014320f0 0000000000000001 c000000000b27638 
>[    1.866640] GPR12: 0000000024000044 c000000000b21680 0000000000000056 0000000001400000 
>[    1.871978] GPR16: 0000000000240ee0 c000000000718923 c0000000007ff6ec 000000000000005e 
>[    1.877351] GPR20: c0000000007e6118 c000000002b74a58 c000000216194080 c000000002b74a70 
>[    1.882770] GPR24: 0000000000000000 0000000000000000 fffffffffffffff4 c00000021643ee40 
>[    1.888249] GPR28: 6b6b6b6b6b6b6b6b c00000021644b188 c000000000a77780 c000000216197920 
>[    1.899228] NIP [c0000000000b6a3c] .lockdep_init_map+0x148/0x66c
>[    1.904944] LR [c0000000000b6a20] .lockdep_init_map+0x12c/0x66c
>[    1.910740] Call Trace:
>[    1.916549] [c000000216197920] [c0000000000b6a08] .lockdep_init_map+0x114/0x66c (unreliable)
>[    1.922686] [c000000216197a20] [c0000000001efd58] .sysfs_add_file_mode+0x90/0x124
>[    1.928883] [c000000216197ae0] [c0000000001efe28] .sysfs_add_file+0x3c/0x50
>[    1.935088] [c000000216197b80] [c0000000001eff84] .sysfs_create_file+0x5c/0x74
>[    1.941348] [c000000216197c20] [c000000000429284] .device_create_file+0x40/0x5c
>[    1.941356] [c000000216197cc0] [c000000000440fec] .wf_register_sensor+0x108/0x178
>[    1.941363] [c000000216197d70] [c0000000007e6368] .smu_sensors_init+0x3b8/0x690
>[    1.941369] [c000000216197e40] [c0000000000084e4] .do_one_initcall+0xac/0x204
>[    1.941374] [c000000216197ef0] [c0000000007b84b8] .kernel_init+0x1f0/0x270
>[    1.941380] [c000000216197f90] [c000000000028f8c] .kernel_thread+0x54/0x70
>[    1.941383] Instruction dump:
>[    1.941385] e93e81c8 80090000 2f800000 409e04f4 482fa5e5 60000000 2fa30000 419e04e4 
>[    1.941395] e93e81d0 80090000 2f800000 409e04d4 <0fe00000> 480004cc fb9d0000 e93e8018 
>
>
>I think I get the point ... I'll go through myself.
>

Thank you!

For this case, you could add sysfs_attr_init() in wf_register_sensor().


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