Suspend: Add config option to disable the freezer if architecture wants that

This patch makes the freezer optional for suspend to allow the
system to work (or not work) like the original PMU suspend.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/kernel/power/power.h b/kernel/power/power.h
index 8ec5499c5ce1..700f44ec8406 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -1,6 +1,7 @@
 #include <linux/suspend.h>
 #include <linux/suspend_ioctls.h>
 #include <linux/utsname.h>
+#include <linux/freezer.h>
 
 struct swsusp_info {
         struct new_utsname      uts;
@@ -203,3 +204,24 @@ enum {
 #define TEST_MAX        (__TEST_AFTER_LAST - 1)
 
 extern int pm_test_level;
+
+#ifdef CONFIG_SUSPEND_FREEZER
+static inline int suspend_freeze_processes(void)
+{
+        return freeze_processes();
+}
+
+static inline void suspend_thaw_processes(void)
+{
+        thaw_processes();
+}
+#else
+static inline int suspend_freeze_processes(void)
+{
+        return 0;
+}
+
+static inline void suspend_thaw_processes(void)
+{
+}
+#endif