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HID: core: remove #ifdef CONFIG_PM from hid_driver

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Allow HID drivers to pass ->suspend, ->resume and ->reset_resume via
pm_ptr().
Through the usage of pm_ptr() the CONFIG_PM-dependent code will always be
compiled, protecting against bitrot.
The linker will then garbage-collect the unused function avoiding any overhead.

The only overhead in the final kernel image and at runtime are a few
extra bytes in 'struct hid_driver'.

The same approach is chosen by 'struct usb_driver' and other subsystems.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20231012-hid-pm_ptr-v1-1-0a71531ca93b@weissschuh.net
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
This commit is contained in:
Thomas Weißschuh 2023-10-12 12:23:38 +02:00 committed by Benjamin Tissoires
parent bab19d1b21
commit df8b030d82
1 changed files with 2 additions and 2 deletions
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4
include/linux/hid.h
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@ -833,11 +833,11 @@ struct hid_driver {
void (*feature_mapping)(struct hid_device *hdev,
struct hid_field *field,
struct hid_usage *usage);
#ifdef CONFIG_PM
int (*suspend)(struct hid_device *hdev, pm_message_t message);
int (*resume)(struct hid_device *hdev);
int (*reset_resume)(struct hid_device *hdev);
#endif
/* private: */
struct device_driver driver;
};