K 10
svn:author
V 6
andrew
K 8
svn:date
V 27
2015-06-01T18:13:32.571365Z
K 7
svn:log
V 210
Clear the C bit of the saved program state register when also clearing the
return value. We use this bit to signal when a syscall has failed, and
without this getcontext/setcontext may fail.

MFC after:	1 week

END