Add a helper which prods processes of the type we are currently
trying to freeze, seeking to get them to run their todo lists.
Signed-off-by: Nigel Cunningham <[email protected]>
kernel/power/process.c | 23 +++++++++++++++++++++++
1 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/kernel/power/process.c b/kernel/power/process.c
index 2857c8b..b2a9147 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -275,6 +275,29 @@ static void signal_threads(int do_all_th
read_unlock(&tasklist_lock);
}
+/*
+ * Prod processes that haven't entered the refrigerator yet.
+ */
+static void prod_processes(int do_all_threads)
+{
+ struct task_struct *g, *p;
+ unsigned long flags;
+
+ read_lock(&tasklist_lock);
+ do_each_thread(g, p) {
+ if (!freezeable(p, do_all_threads))
+ continue;
+
+ spin_lock_irqsave(&p->sighand->siglock, flags);
+ if (!(p->flags & PF_FROZEN)) {
+ recalc_sigpending();
+ signal_wake_up(p, 0);
+ }
+ spin_unlock_irqrestore(&p->sighand->siglock, flags);
+ } while_each_thread(g, p);
+ read_unlock(&tasklist_lock);
+}
+
static inline void freeze(struct task_struct *p)
{
unsigned long flags;
--
Nigel Cunningham nigel at suspend2 dot net
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