Remove even more unneeded variable assignments.

kern_time.c:
- Unused variable `p'.

kern_thr.c:
- Variable `error' is always caught immediately, so no reason to
  initialize it. There is no way that error != 0 at the end of
  create_thread().

kern_sig.c:
- Unused variable `code'.

kern_synch.c:
- `rval' is always assigned in all different cases.

kern_rwlock.c:
- `v' is always overwritten with RW_UNLOCKED further on.

kern_malloc.c:
- `size' is always initialized with the proper value before being used.

kern_exit.c:
- `error' is always caught and returned immediately. abort2() never
  returns a non-zero value.

kern_exec.c:
- `len' is always assigned inside the if-statement right below it.

tty_info.c:
- `td' is always overwritten by FOREACH_THREAD_IN_PROC().

Found by:	LLVM's scan-build

1 files changed, 0 insertions, 2 deletions

diff --git a/sys/kern/kern_exit.c b/sys/kern/kern_exit.c
index 4b4a417262ed..425573474b9b 100644
--- a/sys/kern/kern_exit.c
+++ b/sys/kern/kern_exit.c
@@ -585,8 +585,6 @@ abort2(struct thread *td, struct abort2_args *uap)
 	void *uargs[16];
 	int error, i, sig;
 
-	error = 0;	/* satisfy compiler */
-
 	/*
 	 * Do it right now so we can log either proper call of abort2(), or
 	 * note, that invalid argument was passed. 512 is big enough to