[PATCH] remove add_parent()'s parent argument

add_parent(p, parent) is always called with parent == p->parent, and it makes
no sense to do it differently.  This patch removes this argument.

No changes in affected .o files.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/mips/kernel/irixsig.c

@@ -603,7 +603,7 @@ asmlinkage int irix_waitsys(int type, int pid,
 			/* move to end of parent's list to avoid starvation */
 			write_lock_irq(&tasklist_lock);
 			remove_parent(p);
-			add_parent(p, p->parent);
+			add_parent(p);
 			write_unlock_irq(&tasklist_lock);
 			retval = ru ? getrusage(p, RUSAGE_BOTH, ru) : 0;
 			if (retval)
@@ -643,7 +643,7 @@ asmlinkage int irix_waitsys(int type, int pid,
 				write_lock_irq(&tasklist_lock);
 				remove_parent(p);
 				p->parent = p->real_parent;
-				add_parent(p, p->parent);
+				add_parent(p);
 				do_notify_parent(p, SIGCHLD);
 				write_unlock_irq(&tasklist_lock);
 			} else

fs/exec.c

@@ -725,8 +725,8 @@ static int de_thread(struct task_struct *tsk)
 		current->group_leader = current;
 		leader->group_leader = leader;
 
-		add_parent(current, current->parent);
-		add_parent(leader, leader->parent);
+		add_parent(current);
+		add_parent(leader);
 		if (ptrace) {
 			current->ptrace = ptrace;
 			__ptrace_link(current, parent);

include/linux/sched.h

@@ -1184,7 +1184,7 @@ extern void wait_task_inactive(task_t * p);
 #endif
 
 #define remove_parent(p)	list_del_init(&(p)->sibling)
-#define add_parent(p, parent)	list_add_tail(&(p)->sibling,&(parent)->children)
+#define add_parent(p)		list_add_tail(&(p)->sibling,&(p)->parent->children)
 
 #define REMOVE_LINKS(p) do {					\
 	if (thread_group_leader(p))				\
@@ -1195,7 +1195,7 @@ extern void wait_task_inactive(task_t * p);
 #define SET_LINKS(p) do {					\
 	if (thread_group_leader(p))				\
 		list_add_tail(&(p)->tasks,&init_task.tasks);	\
-	add_parent(p, (p)->parent);				\
+	add_parent(p);						\
 	} while (0)
 
 #define next_task(p)	list_entry((p)->tasks.next, struct task_struct, tasks)

kernel/exit.c

@@ -1281,7 +1281,7 @@ static int wait_task_stopped(task_t *p, int delayed_group_leader, int noreap,
 
 	/* move to end of parent's list to avoid starvation */
 	remove_parent(p);
-	add_parent(p, p->parent);
+	add_parent(p);
 
 	write_unlock_irq(&tasklist_lock);