Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / kernel / power / process.c

diff --git a/kernel/power/process.c b/kernel/power/process.c
index b2a5f67..72e72d2 100644 (file)
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -66,13 +66,25 @@ static inline void freeze_process(struct task_struct *p)
        }
 }
 
+static void cancel_freezing(struct task_struct *p)
+{
+       unsigned long flags;
+
+       if (freezing(p)) {
+               pr_debug("  clean up: %s\n", p->comm);
+               do_not_freeze(p);
+               spin_lock_irqsave(&p->sighand->siglock, flags);
+               recalc_sigpending_tsk(p);
+               spin_unlock_irqrestore(&p->sighand->siglock, flags);
+       }
+}
+
 /* 0 = success, else # of processes that we failed to stop */
 int freeze_processes(void)
 {
        int todo, nr_user, user_frozen;
        unsigned long start_time;
        struct task_struct *g, *p;
-       unsigned long flags;
 
        printk( "Stopping tasks: " );
        start_time = jiffies;
@@ -85,6 +97,10 @@ int freeze_processes(void)
                                continue;
                        if (frozen(p))
                                continue;
+                       if (p->state == TASK_TRACED && frozen(p->parent)) {
+                               cancel_freezing(p);
+                               continue;
+                       }
                        if (p->mm && !(p->flags & PF_BORROWED_MM)) {
                                /* The task is a user-space one.
                                 * Freeze it unless there's a vfork completion
@@ -126,13 +142,7 @@ int freeze_processes(void)
                do_each_thread(g, p) {
                        if (freezeable(p) && !frozen(p))
                                printk(KERN_ERR "  %s\n", p->comm);
-                       if (freezing(p)) {
-                               pr_debug("  clean up: %s\n", p->comm);
-                               p->flags &= ~PF_FREEZE;
-                               spin_lock_irqsave(&p->sighand->siglock, flags);
-                               recalc_sigpending_tsk(p);
-                               spin_unlock_irqrestore(&p->sighand->siglock, flags);
-                       }
+                       cancel_freezing(p);
                } while_each_thread(g, p);
                read_unlock(&tasklist_lock);
                return todo;