Change the kernel's ucred API as follows:

- crhold() returns a reference to the ucred whose refcount it bumps.
- crcopy() now simply copies the credentials from one credential to
  another and has no return value.
- a new crshared() primitive is added which returns true if a ucred's
  refcount is > 1 and false (0) otherwise.

1 files changed, 1 insertions, 2 deletions

diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c
index f5ae42c..592ff44 100644
--- a/sys/kern/kern_fork.c
+++ b/sys/kern/kern_fork.c
@@ -471,8 +471,7 @@ again:
 	 * We start off holding one spinlock after fork: sched_lock.
 	 */
 	PROC_LOCK(p1);
-	crhold(p1->p_ucred);
-	p2->p_ucred = p1->p_ucred;
+	p2->p_ucred = crhold(p1->p_ucred);
 
 	if (p2->p_args)
 		p2->p_args->ar_ref++;