So Greg added a might_sleep() to kobject_put(). Because on the final put()
it will indeed do sleepy things.
Debug: sleeping function called from invalid context at drivers/base/core.c:343
in_atomic():1, irqs_disabled():0
Call Trace: <IRQ> <ffffffff80126e07>{__might_sleep+190}
<ffffffff802a85ec>{put_device+27} <ffffffff802cd071>{scsi_put_command+186}
<ffffffff802d19ca>{scsi_next_command+45} <ffffffff802d1ad7>{scsi_end_request+197}
<ffffffff802d1d3b>{scsi_io_completion+447} <ffffffff80308fdf>{sd_rw_intr+559}
<ffffffff802cd76a>{scsi_finish_command+148} <ffffffff802d2514>{scsi_softirq_done+220}
<ffffffff80228472>{blk_done_softirq+127} <ffffffff8013404b>{__do_softirq+75}
<ffffffff8010f13e>{call_softirq+30} <ffffffff80110835>{do_softirq+51}
<ffffffff80134188>{irq_exit+63} <ffffffff801107f8>{do_IRQ+55}
<ffffffff8010bfb0>{mwait_idle+0} <ffffffff8010e11a>{ret_from_intr+0} <EOI>
<ffffffff8010bfb0>{mwait_idle+0} <ffffffff8010bfea>{mwait_idle+58}
<ffffffff8010bf7d>{cpu_idle+100} <ffffffff805a6a8b>{start_secondary+1155}
I guess we already knew about that problem. Greg, I'll need to drop the
patch to be able to make a halfway releasable kernel.
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