Remove sched_free_thread() which was only used

in diagnostics. It has outlived its usefulness and has started
causing panics for people who turn on DIAGNOSTIC, in what is otherwise
good code.

MFC after:	2 days

3 files changed, 0 insertions, 19 deletions

diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c
index 90f13c4..8451861 100644
--- a/sys/kern/kern_fork.c
+++ b/sys/kern/kern_fork.c
@@ -831,9 +831,6 @@ fork_exit(callout, arg, frame)
 		kthread_exit(0);
 	}
 	PROC_UNLOCK(p);
-#ifdef DIAGNOSTIC
-	cred_free_thread(td);
-#endif
 	mtx_assert(&Giant, MA_NOTOWNED);
 }
 
diff --git a/sys/kern/kern_prot.c b/sys/kern/kern_prot.c
index 2a0aafb..28905f2 100644
--- a/sys/kern/kern_prot.c
+++ b/sys/kern/kern_prot.c
@@ -1829,19 +1829,6 @@ crdup(struct ucred *cr)
 	return (newcr);
 }
 
-#ifdef DIAGNOSTIC
-void
-cred_free_thread(struct thread *td)
-{
-	struct ucred *cred;
-
-	cred = td->td_ucred;
-	td->td_ucred = NULL;
-	if (cred != NULL)
-		crfree(cred);
-}
-#endif
-
 /*
  * Fill in a struct xucred based on a struct ucred.
  * MPSAFE
diff --git a/sys/kern/subr_trap.c b/sys/kern/subr_trap.c
index fc129c4..ccdaa2d 100644
--- a/sys/kern/subr_trap.c
+++ b/sys/kern/subr_trap.c
@@ -261,8 +261,5 @@ ast(struct trapframe *framep)
 	}
 
 	userret(td, framep, sticks);
-#ifdef DIAGNOSTIC
-	cred_free_thread(td);
-#endif
 	mtx_assert(&Giant, MA_NOTOWNED);
 }