ACPI: button: Remove unused acpi_lid_notifier_[un]register() functions

There are no users of the acpi_lid_notifier_[un]register functions,
so lets remove them.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index a090e9542d82d90a2b0704c405e564ca6b193904..d27b01c0323d05ab402f3f5c39e252bba1be468c 100644 (file)
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -147,7 +147,6 @@ struct acpi_button {
        bool suspended;
 };
 
-static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier);
 static struct acpi_device *lid_device;
 static long lid_init_state = -1;
 
@@ -177,7 +176,6 @@ static int acpi_lid_evaluate_state(struct acpi_device *device)
 static int acpi_lid_notify_state(struct acpi_device *device, int state)
 {
        struct acpi_button *button = acpi_driver_data(device);
-       int ret;
        ktime_t next_report;
        bool do_update;
 
@@ -254,18 +252,7 @@ static int acpi_lid_notify_state(struct acpi_device *device, int state)
                button->last_time = ktime_get();
        }
 
-       ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);
-       if (ret == NOTIFY_DONE)
-               ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,
-                                                  device);
-       if (ret == NOTIFY_DONE || ret == NOTIFY_OK) {
-               /*
-                * It is also regarded as success if the notifier_chain
-                * returns NOTIFY_OK or NOTIFY_DONE.
-                */
-               ret = 0;
-       }
-       return ret;
+       return 0;
 }
 
 static int __maybe_unused acpi_button_state_seq_show(struct seq_file *seq,
@@ -362,18 +349,6 @@ static int acpi_button_remove_fs(struct acpi_device *device)
 /* --------------------------------------------------------------------------
                                 Driver Interface
    -------------------------------------------------------------------------- */
-int acpi_lid_notifier_register(struct notifier_block *nb)
-{
-       return blocking_notifier_chain_register(&acpi_lid_notifier, nb);
-}
-EXPORT_SYMBOL(acpi_lid_notifier_register);
-
-int acpi_lid_notifier_unregister(struct notifier_block *nb)
-{
-       return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb);
-}
-EXPORT_SYMBOL(acpi_lid_notifier_unregister);
-
 int acpi_lid_open(void)
 {
        if (!lid_device)

diff --git a/include/acpi/button.h b/include/acpi/button.h
index 3a2b8535dec6c4eaba511e1a445d3c0f187fddec..340da7784cc8582df50363cfa0330f7af3a9ba4d 100644 (file)
--- a/include/acpi/button.h
+++ b/include/acpi/button.h
@@ -2,21 +2,9 @@
 #ifndef ACPI_BUTTON_H
 #define ACPI_BUTTON_H
 
-#include <linux/notifier.h>
-
 #if IS_ENABLED(CONFIG_ACPI_BUTTON)
-extern int acpi_lid_notifier_register(struct notifier_block *nb);
-extern int acpi_lid_notifier_unregister(struct notifier_block *nb);
 extern int acpi_lid_open(void);
 #else
-static inline int acpi_lid_notifier_register(struct notifier_block *nb)
-{
-       return 0;
-}
-static inline int acpi_lid_notifier_unregister(struct notifier_block *nb)
-{
-       return 0;
-}
 static inline int acpi_lid_open(void)
 {
        return 1;