K 10
svn:author
V 8
vangyzen
K 8
svn:date
V 27
2015-10-02T13:48:32.080779Z
K 7
svn:log
V 359
MFC r280792

Clean up some cosmetic nits in kern_umtx.c, found during recent work
in this area and by the Clang static analyzer.

Remove some dead assignments.

Fix a typo in a panic string.

Use umtx_pi_disown() instead of duplicate code.

Use an existing variable instead of curthread.

Approved by:    kib (mentor until recently)
Sponsored by:   Dell Inc.

END