[PATCH] Fix suspend with traced tasks

strace /bin/bash misbehaves after resume; this fixes it.

(akpm: it's scary calling refrigerator() in state TASK_TRACED, but it seems to
do the right thing).
Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/power/process.c

@@ -26,8 +26,7 @@ static inline int freezeable(struct task_struct * p)
 	    (p->flags & PF_NOFREEZE) ||
 	    (p->exit_state == EXIT_ZOMBIE) ||
 	    (p->exit_state == EXIT_DEAD) ||
-	    (p->state == TASK_STOPPED) ||
-	    (p->state == TASK_TRACED))
+	    (p->state == TASK_STOPPED))
 		return 0;
 	return 1;
 }

kernel/signal.c

@@ -1560,6 +1560,7 @@ static void ptrace_stop(int exit_code, int nostop_code, siginfo_t *info)
 	/* Let the debugger run.  */
 	set_current_state(TASK_TRACED);
 	spin_unlock_irq(&current->sighand->siglock);
+	try_to_freeze();
 	read_lock(&tasklist_lock);
 	if (likely(current->ptrace & PT_PTRACED) &&
 	    likely(current->parent != current->real_parent ||