------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.31/fs/buffer.c:1152 mark_buffer_dirty+0x70/0x90()
Hardware name: HP Compaq 6720s
Modules linked in: nls_iso8859_1 nls_cp437 vfat fat usb_storage binfmt_misc ppdev snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss iptable_filter snd_seq_midi ip_tables joydev x_tables snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device psmouse serio_raw snd soundcore snd_page_alloc b43 mac80211 cfg80211 led_class lp parport fbcon tileblit font bitblit softcursor i915 drm i2c_algo_bit ssb intel_agp agpgart video output e1000e
Pid: 2520, comm: kjournald Not tainted 2.6.31-14-generic #48-Ubuntu
Call Trace:
 [<c014518d>] warn_slowpath_common+0x6d/0xa0
 [<c02093b0>] ? mark_buffer_dirty+0x70/0x90
 [<c02093b0>] ? mark_buffer_dirty+0x70/0x90
 [<c01451d5>] warn_slowpath_null+0x15/0x20
 [<c02093b0>] mark_buffer_dirty+0x70/0x90
 [<c02961bd>] journal_update_superblock+0x6d/0xd0
 [<c0296381>] __journal_abort_soft+0x91/0xc0
 [<c02978e9>] ? __journal_remove_journal_head+0x99/0x110
 [<c02963b8>] journal_abort+0x8/0x10
 [<c0293bd7>] journal_commit_transaction+0x6e7/0xbf0
 [<c05707da>] ? _spin_lock_irqsave+0x2a/0x40
 [<c0150485>] ? try_to_del_timer_sync+0x45/0x50
 [<c0296c13>] kjournald+0xb3/0x1f0
 [<c015c280>] ? autoremove_wake_function+0x0/0x40
 [<c0296b60>] ? kjournald+0x0/0x1f0
 [<c015bf8c>] kthread+0x7c/0x90
 [<c015bf10>] ? kthread+0x0/0x90
 [<c0104007>] kernel_thread_helper+0x7/0x10
---[ end trace d382dde009637a86 ]---