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CVS commit: src/sys/kern

Module Name:    src
Committed By:   ad
Date:           Sun Dec 21 10:25:00 UTC 2008

Modified Files:
        src/sys/kern: sys_descrip.c

Log Message:
Prevent a potential deadlock from a multithreaded process doing:

t1      dup2(0, 1)
t2      dup2(1, 0)

To generate a diff of this commit:
cvs rdiff -r1.7 -r1.8 src/sys/kern/sys_descrip.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

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