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Subject: 2.6.33.5 rt23: sleeping function called from invalid context
From: Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
       rt-users <linux-rt-users@vger.kernel.org>,
       Steven Rostedt <rostedt@goodmis.org>, Nick Piggin <npiggin@suse.de>,
       John Stultz <johnstul@us.ibm.com>, nando@ccrma.Stanford.EDU
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Date: Wed, 07 Jul 2010 20:54:30 -0700
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After a suspend/wake up cycle, just after upgrading to fc12 (I did not
see this with the same basic kernel - that is, compiled from the same
source + patches - under fc11). 

BUG: sleeping function called from invalid context at
kernel/rtmutex.c:684
pcnt: 0 0 in_atomic(): 0, irqs_disabled(): 1, pid: 10582, name:
pm-suspend
Pid: 10582, comm: pm-suspend Not tainted
2.6.33.5-120.rt23.1.fc11.ccrma.i686.rtPAE #1
Call Trace:
[<c042eced>] __might_sleep+0xcc/0xd4
[<c0464f57>] rt_spin_lock_fastlock.clone.1+0x26/0x5f
[<c0792862>] rt_spin_lock+0x8/0xa
[<c040dddc>] read_persistent_clock+0x11/0x30
[<c045d1de>] timekeeping_suspend+0xe/0x4e
[<c0640c9e>] sysdev_suspend+0x15c/0x356
[<c0792906>] ? _mutex_unlock+0x8/0xa
[<c046afc1>] suspend_devices_and_enter+0xea/0x17f
[<c046b11e>] enter_state+0xc8/0x114
[<c046a9cf>] state_store+0x93/0xa7
[<c046a93c>] ? state_store+0x0/0xa7
[<c05a6505>] kobj_attr_store+0x16/0x22
[<c0515afa>] sysfs_write_file+0xbf/0xea
[<c0515a3b>] ? sysfs_write_file+0x0/0xea
[<c04d26ba>] vfs_write+0x80/0xdf
[<c0465134>] ? rt_up_read+0x13/0x15
[<c04d27ad>] sys_write+0x3b/0x5d
[<c040895f>] sysenter_do_call+0x12/0x28

-- Fernando


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