[Suspend2][ 02/21] [Suspend2] Modify action state.

[Nigel Cunningham <nigel@suspend2.net>]

Modify the suspend_action state in response to a userspace message. This
variable is an unsigned long treated as bitflags tell us whether to reboot
instead of powering down, pause between step, log everything and so on.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

 kernel/power/ui.c |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/kernel/power/ui.c b/kernel/power/ui.c
index 1ef8957..b952bf7 100644
--- a/kernel/power/ui.c
+++ b/kernel/power/ui.c
@@ -67,3 +67,19 @@ static int progress_granularity = 30;
 
 DECLARE_WAIT_QUEUE_HEAD(userui_wait_for_key);
 
+static void ui_nl_set_state(int n)
+{
+	/* Only let them change certain settings */
+	static const int suspend_action_mask =
+		(1 << SUSPEND_REBOOT) | (1 << SUSPEND_PAUSE) | (1 << SUSPEND_SLOW) |
+		(1 << SUSPEND_LOGALL) | (1 << SUSPEND_SINGLESTEP) |
+		(1 << SUSPEND_PAUSE_NEAR_PAGESET_END);
+
+	suspend_action = (suspend_action & (~suspend_action_mask)) |
+		(n & suspend_action_mask);
+
+	if (!test_action_state(SUSPEND_PAUSE) &&
+			!test_action_state(SUSPEND_SINGLESTEP))
+		wake_up_interruptible(&userui_wait_for_key);
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net