9p: fix a race condition bug in umount which caused a segfault
authorEric Van Hensbergen <ericvh@ericvh-desktop.austin.ibm.com>
Fri, 13 Jul 2007 21:47:58 +0000 (16:47 -0500)
committerEric Van Hensbergen <ericvh@ericvh-desktop.austin.ibm.com>
Sat, 14 Jul 2007 20:14:19 +0000 (15:14 -0500)
umounting partitions after heavy activity would sometimes trigger a
segmentation violation.  This fix appears to remove that problem.
Fix originally provided by Latchesar Ionkov.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

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