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PM: Add EXPORT macros for exporting PM functions

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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>
This commit is contained in:
Richard Fitzgerald 2023-02-13 16:50:05 +00:00 committed by Rafael J. Wysocki
parent 450316dc4f
commit 41a337b40e
1 changed files with 4 additions and 0 deletions
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4
include/linux/pm.h
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@ -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, "", "")