On bootup, I get the following warning logged:

[   12.192109] ------------[ cut here ]------------
[   12.192118] WARNING: at fs/fs-writeback.c:972
__mark_inode_dirty+0x1d4/0x1e0()
[   12.192122] Hardware name: HP Pavilion dv2700 Notebook PC
[   12.192124] bdi-block not registered
[   12.192126] Modules linked in: loop(+) dm_mod ide_cd_mod cdrom
snd_hda_codec_conexant ide_pci_generic snd_hda_intel snd_hda_codec r8712u(C)
amd74xx snd_pcm ide_core snd_timer snd k8temp sg joydev snd_page_alloc
forcedeth hwmon i2c_nforce2 serio_raw i2c_core battery ac button ext3 jbd
mbcache ohci_hcd sd_mod ehci_hcd usbcore fan processor ahci libahci libata
scsi_mod thermal
[   12.192164] Pid: 2338, comm: udisks-part-id Tainted: G         C 
2.6.36-rc3-realtek+ #7
[   12.192167] Call Trace:
[   12.192174]  [<ffffffff8104614a>] warn_slowpath_common+0x7a/0xb0
[   12.192178]  [<ffffffff81046221>] warn_slowpath_fmt+0x41/0x50
[   12.192183]  [<ffffffff81325584>] ? _raw_spin_lock+0x34/0x40
[   12.192186]  [<ffffffff8112ded5>] ? __mark_inode_dirty+0x65/0x1e0
[   12.192190]  [<ffffffff8112e044>] __mark_inode_dirty+0x1d4/0x1e0
[   12.192195]  [<ffffffff811210bd>] touch_atime+0x12d/0x170
[   12.192201]  [<ffffffff810cbb61>] generic_file_aio_read+0x5c1/0x720
[   12.192205]  [<ffffffff810e7fbd>] ? handle_mm_fault+0x75d/0x950
[   12.192211]  [<ffffffff8110a862>] do_sync_read+0xd2/0x110
[   12.192214]  [<ffffffff8107a4a0>] ? mark_held_locks+0x70/0xa0
[   12.192218]  [<ffffffff8132436f>] ? __mutex_unlock_slowpath+0xbf/0x150
[   12.192222]  [<ffffffff8107a6cd>] ? trace_hardirqs_on+0xd/0x10
[   12.192226]  [<ffffffff8110af93>] vfs_read+0xc3/0x170
[   12.192229]  [<ffffffff8110b08c>] sys_read+0x4c/0x80
[   12.192234]  [<ffffffff81002d2b>] system_call_fastpath+0x16/0x1b
[   12.192237] ---[ end trace 9b3df7d4a57af8dc ]---
[   12.198091] loop: module loaded

The kernel is a fresh pull from linux-2.6.git with some code added to staging for an RTL8192 USB device.