Revert my previous errno hack, that is certainly an issue,

and always has been, but the system call itself returns
errno in a register so the problem is really a function of
libc, not the system call.

Discussed with : Matthew Dillion <dillon@apollo.backplane.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/sys/kern/kern_umtx.c b/sys/kern/kern_umtx.c
index 1e93a66..31a5cb1 100644
--- a/sys/kern/kern_umtx.c
+++ b/sys/kern/kern_umtx.c
@@ -756,6 +756,5 @@ _umtx_op(struct thread *td, struct _umtx_op_args *uap)
 		error = EINVAL;
 		break;
 	}
-	td->td_retval[0] = -error;
-	return (0);
+	return (error);
 }