[CLONE_*TID]: Make tsk->user_tid and int so that 64-bit arches work.

- futex uses int as its atomic word type, we pass in user_tid
to the futex routines, so the types must match

arch/i386/kernel/process.c

@@ -625,7 +625,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long esp,
 	 * Does the userspace VM want the TID cleared on mm_release()?
 	 */
 	if (clone_flags & CLONE_CLEARTID)
-		p->user_tid = (long *) childregs->edx;
+		p->user_tid = (int *) childregs->edx;
 	return 0;
 }
 

include/linux/sched.h

@@ -309,7 +309,7 @@ struct task_struct {
 
 	wait_queue_head_t wait_chldexit;	/* for wait4() */
 	struct completion *vfork_done;		/* for vfork() */
-	long *user_tid;				/* for CLONE_CLEARTID */
+	int *user_tid;				/* for CLONE_CLEARTID */
 
 	unsigned long rt_priority;
 	unsigned long it_real_value, it_prof_value, it_virt_value;

kernel/fork.c

@@ -377,7 +377,7 @@ void mm_release(void)
 		 * We dont check the error code - if userspace has
 		 * not set up a proper pointer then tough luck.
 		 */
-		put_user(0UL, tsk->user_tid);
+		put_user(0, tsk->user_tid);
 		sys_futex(tsk->user_tid, FUTEX_WAKE, 1, NULL);
 	}
 }