PM: Add EXPORT macros for exporting PM functions

Add a pair of macros for exporting functions only if CONFIG_PM
is enabled.

The naming follows the style of the standard EXPORT_SYMBOL_*()
macros that they replace.

Sometimes a module wants to export PM functions directly to other
drivers, not a complete struct dev_pm_ops. A typical example is
where a core library exports the generic (shared) implementation
and calling code wraps one or more of these in custom code.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/include/linux/pm.h b/include/linux/pm.h
index 93cd34f00822cabfe72ccc0e25aea710d05403f6..035d9649eba4869b5573e608e288f6edbce88c09 100644 (file)
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -379,9 +379,13 @@ const struct dev_pm_ops name = { \
        const struct dev_pm_ops name;                                   \
        __EXPORT_SYMBOL(name, sec, ns);                                 \
        const struct dev_pm_ops name
+#define EXPORT_PM_FN_GPL(name)         EXPORT_SYMBOL_GPL(name)
+#define EXPORT_PM_FN_NS_GPL(name, ns)  EXPORT_SYMBOL_NS_GPL(name, ns)
 #else
 #define _EXPORT_DEV_PM_OPS(name, sec, ns)                              \
        static __maybe_unused const struct dev_pm_ops __static_##name
+#define EXPORT_PM_FN_GPL(name)
+#define EXPORT_PM_FN_NS_GPL(name, ns)
 #endif
 
 #define EXPORT_DEV_PM_OPS(name) _EXPORT_DEV_PM_OPS(name, "", "")