2.5.67 sleep function from illegal context

[Balram Adlakha]

I get this repeatedly each second:

Debug: sleeping function called from illegal context at mm/slab.c:1658

Call Trace:
  [<c0117459>] __might_sleep+0x5f/0x72
  [<c0136b93>] kmalloc+0x88/0x8f
  [<c02583c7>] accel_cursor+0xd5/0x2f8
  [<c02587db>] fb_vbl_handler+0x82/0x9d
  [<c0115ecb>] scheduler_tick+0x2d9/0x2de
  [<c0120b89>] update_process_times+0x46/0x50
  [<c0256edc>] cursor_timer_handler+0x0/0x3d
  [<c0256efd>] cursor_timer_handler+0x21/0x3d
  [<c0120c3d>] run_timer_softirq+0x90/0x170
  [<c010e577>] timer_interrupt+0x56/0x119
  [<c011d065>] do_softirq+0xa1/0xa3
  [<c010abf6>] do_IRQ+0x10e/0x12b
  [<c0109320>] common_interrupt+0x18/0x20

This happens in both 2.5.66 and 67 when I shut down X
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