Basic initialisation and cleanup for a suspend cycle.
Signed-off-by: Nigel Cunningham <[email protected]>
kernel/power/suspend.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 73 insertions(+), 0 deletions(-)
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 6457d75..504eed7 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -502,3 +502,76 @@ static int check_still_keeping_image(voi
return 0;
}
+static int suspend_init(void)
+{
+ suspend_result = 0;
+
+ printk(name_suspend "Initiating a software suspend cycle.\n");
+
+ nr_suspends++;
+ clear_suspend_state(SUSPEND_NOW_RESUMING);
+
+ orig_system_state = system_state;
+
+ suspend_io_time[0][0] = suspend_io_time[0][1] =
+ suspend_io_time[1][0] =
+ suspend_io_time[1][1] = 0;
+
+ free_metadata(); /* We might have kept it */
+
+ if (!test_suspend_state(SUSPEND_CAN_SUSPEND))
+ return 0;
+
+ if (allocate_bitmaps())
+ return 0;
+
+ suspend_prepare_console();
+ disable_nonboot_cpus();
+
+ return 1;
+}
+
+void suspend_cleanup(void)
+{
+ int i;
+
+ i = get_suspend_debug_info();
+
+ suspend_free_extra_pagedir_memory();
+
+ pagedir1.pageset_size = pagedir2.pageset_size = 0;
+
+ system_state = orig_system_state;
+
+ thaw_processes(FREEZER_KERNEL_THREADS);
+
+#ifdef CONFIG_SUSPEND2_KEEP_IMAGE
+ if (test_action_state(SUSPEND_KEEP_IMAGE) &&
+ !test_result_state(SUSPEND_ABORTED)) {
+ suspend_message(SUSPEND_ANY_SECTION, SUSPEND_LOW, 1,
+ name_suspend "Not invalidating the image due "
+ "to Keep Image being enabled.\n");
+ set_result_state(SUSPEND_KEPT_IMAGE);
+ } else
+#endif
+ if (suspend_active_writer)
+ suspend_active_writer->invalidate_image();
+
+ free_metadata();
+
+ if (debug_info_buffer) {
+ /* Printk can only handle 1023 bytes, including
+ * its level mangling. */
+ for (i = 0; i < 3; i++)
+ printk("%s", debug_info_buffer + (1023 * i));
+ free_page((unsigned long) debug_info_buffer);
+ debug_info_buffer = NULL;
+ }
+
+ thaw_processes(FREEZER_ALL_THREADS);
+ enable_nonboot_cpus();
+ suspend_cleanup_console();
+
+ up(&pm_sem);
+}
+
--
Nigel Cunningham nigel at suspend2 dot net
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