BUG: 2.6.2-mm1: destroy_workqueue

[Matthias Urlichs]

I had a crash when unmounting a reiserfs at shutdown time.

Apparently, destroy_workqueue() inlines list_del(), which checks for

148             BUG_ON(entry->prev->next != entry);

This is a problem when entry->prev is NULL.  :-/

Call trace, copied off the screen by hand:
destroy_workqueue+0x30
do_journal_release+0x4e
journal_mark_dirty+0x18c
journal_release+0x10
reiserfs_put_super+0x24

Built using gcc version 3.3.2 (Debian), no other patches.

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