TAKE - fix race in _pagebuf_free_bh()

[Eric Sandeen <sandeen@xxxxxxx>]

Also remove setting bh->b_state = 0 after getting a prealloc'd bh,
we zero the whole struct after we get it anyway.

fix race in _pagebuf_free_bh()
CONTRIBUTED: Mike Ovsiannikov <mikes@xxxxxx>


Date:  Mon Oct 21 10:06:40 PDT 2002
Workarea:  
stout.americas.sgi.com:/localhome/src/sandeen/2.4.x-xfs/workarea-alwaysclean

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.x-xfs


Modid:  2.4.x-xfs:slinx:130613a
linux/fs/xfs/pagebuf/page_buf.c - 1.67