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>
---
 include/linux/pm.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/pm.h b/include/linux/pm.h
index 93cd34f00822..035d9649eba4 100644
--- 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, "", "")
-- 
2.30.2

On Mon, Feb 13, 2023 at 5:50 PM Richard Fitzgerald
<rf@opensource.cirrus.com> wrote:
>
> 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>
> ---
>  include/linux/pm.h | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/include/linux/pm.h b/include/linux/pm.h
> index 93cd34f00822..035d9649eba4 100644
> --- 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, "", "")
> --

Applied as 6.3 material, thanks!