K 10
svn:author
V 2
ed
K 8
svn:date
V 27
2015-10-15T17:50:28.452642Z
K 7
svn:log
V 393
Properly set the return value for casueword to 0 upon success.

While trying to get multithreading working for CloudABI on aarch64, I
noticed that compare-and-exchange operations in kernelspace would always
fail. It turns out that we don't properly set the return value to 0 when
the compare and exchange succeeds.

Approved by:	andrew
Differential Revision:	https://reviews.freebsd.org/D3899

END