Return ENOSYS for unsupported operation.

diff --git a/sys/kern/sys_futex.c b/sys/kern/sys_futex.c
index 0db6a10..9d2af79 100644 (file)
--- a/sys/kern/sys_futex.c
+++ b/sys/kern/sys_futex.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: sys_futex.c,v 1.1 2017/04/28 13:50:55 mpi Exp $ */
+/*     $OpenBSD: sys_futex.c,v 1.2 2017/04/30 10:10:21 mpi Exp $ */
 
 /*
  * Copyright (c) 2016-2017 Martin Pieuchot
@@ -85,7 +85,6 @@ sys_futex(struct proc *p, void *v, register_t *retval)
        uint32_t val = SCARG(uap, val);
        const struct timespec *timeout = SCARG(uap, timeout);
        void *g = SCARG(uap, g);
-       int error = 0;
 
        switch (op) {
        case FUTEX_WAIT:
@@ -106,11 +105,11 @@ sys_futex(struct proc *p, void *v, register_t *retval)
                rw_exit_write(&ftlock);
                break;
        default:
-               error = ENOSYS;
+               *retval = ENOSYS;
                break;
        }
 
-       return (error ? -1 : 0);
+       return 0;
 }
 
 /*