ACPI: Schedule /proc/acpi/event for removal

Schedule /proc/acpi/event for removal in 6 months.

Re-name acpi_bus_generate_event() to acpi_bus_generate_proc_event()
to make sure there is no confusion that it is for /proc/acpi/event only.

Add CONFIG_ACPI_PROC_EVENT to allow removal of /proc/acpi/event.
There is no functional change if CONFIG_ACPI_PROC_EVENT=y

Signed-off-by: Len Brown <len.brown@intel.com>

18 files changed, 64 insertions, 29 deletions

diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index a43d2878a4ef..b9a3fdc1cc5a 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -197,6 +197,14 @@ Who:	Len Brown <len.brown@intel.com>
 
 ---------------------------
 
+What:   /proc/acpi/event
+When:   February 2008
+Why:    /proc/acpi/event has been replaced by events via the input layer
+        and netlink since 2.6.23.
+Who:    Len Brown <len.brown@intel.com>
+
+---------------------------
+
 What:   Compaq touchscreen device emulation
 When:   Oct 2007
 Files:  drivers/input/tsdev.c
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index f1372de4ce79..574259476fbf 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -68,6 +68,20 @@ config ACPI_PROCFS
 
           Say N to delete /proc/acpi/ files that have moved to /sys/
 
+config ACPI_PROC_EVENT
+        bool "Deprecated /proc/acpi/event support"
+        depends on PROC_FS
+        ---help---
+          A user-space daemon, acpi, typically read /proc/acpi/event
+          and handled all ACPI sub-system generated events.
+
+          These events are now delivered to user-space via
+          either the input layer, or as netlink events.
+
+          This build option enables the old code for for legacy
+          user-space implementation.  After some time, this will
+          be moved under CONFIG_ACPI_PROCFS, and then deleted.
+
 config ACPI_AC
         tristate "AC Adapter"
         depends on X86
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index b53c2cfcafd3..26d70702b313 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -204,7 +204,7 @@ static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
         case ACPI_NOTIFY_BUS_CHECK:
         case ACPI_NOTIFY_DEVICE_CHECK:
                 acpi_ac_get_state(ac);
-                acpi_bus_generate_event(device, event, (u32) ac->state);
+                acpi_bus_generate_proc_event(device, event, (u32) ac->state);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
                                                   device->dev.bus_id, event,
                                                   (u32) ac->state);
diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c
index 86fd142f4bf3..d915fec9bf63 100644
--- a/drivers/acpi/asus_acpi.c
+++ b/drivers/acpi/asus_acpi.c
@@ -1069,7 +1069,7 @@ static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
                 hotk->brightness = (event & ~((u32) BR_DOWN));
         }
 
-        acpi_bus_generate_event(hotk->device, event,
+        acpi_bus_generate_proc_event(hotk->device, event,
                                 hotk->event_count[event % 128]++);
 
         return;
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 9f0bf90afdab..91dc4b316a08 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -867,7 +867,7 @@ static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
         case ACPI_NOTIFY_DEVICE_CHECK:
                 device = battery->device;
                 acpi_battery_notify_update(battery);
-                acpi_bus_generate_event(device, event,
+                acpi_bus_generate_proc_event(device, event,
                                         acpi_battery_present(battery));
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
                                                   device->dev.bus_id, event,
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index e5084ececb6f..9ba778a2b484 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -276,6 +276,7 @@ EXPORT_SYMBOL(acpi_bus_set_power);
                                 Event Management
    -------------------------------------------------------------------------- */
 
+#ifdef CONFIG_ACPI_PROC_EVENT
 static DEFINE_SPINLOCK(acpi_bus_event_lock);
 
 LIST_HEAD(acpi_bus_event_list);
@@ -283,7 +284,7 @@ DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
 
 extern int event_is_open;
 
-int acpi_bus_generate_event(struct acpi_device *device, u8 type, int data)
+int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
 {
         struct acpi_bus_event *event = NULL;
         unsigned long flags = 0;
@@ -314,7 +315,7 @@ int acpi_bus_generate_event(struct acpi_device *device, u8 type, int data)
         return 0;
 }
 
-EXPORT_SYMBOL(acpi_bus_generate_event);
+EXPORT_SYMBOL(acpi_bus_generate_proc_event);
 
 int acpi_bus_receive_event(struct acpi_bus_event *event)
 {
@@ -360,6 +361,7 @@ int acpi_bus_receive_event(struct acpi_bus_event *event)
 }
 
 EXPORT_SYMBOL(acpi_bus_receive_event);
+#endif  /* CONFIG_ACPI_PROC_EVENT */
 
 /* --------------------------------------------------------------------------
                              Notification Handling
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index 540581338ef5..2e79a3395ecf 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -284,7 +284,7 @@ static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
                 }
                 input_sync(input);
 
-                acpi_bus_generate_event(button->device, event,
+                acpi_bus_generate_proc_event(button->device, event,
                                         ++button->pushed);
                 break;
         default:
diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index b7b143288c22..cf6d5161cf31 100644
--- a/drivers/acpi/event.c
+++ b/drivers/acpi/event.c
@@ -17,6 +17,7 @@
 #define _COMPONENT              ACPI_SYSTEM_COMPONENT
 ACPI_MODULE_NAME("event");
 
+#ifdef CONFIG_ACPI_PROC_EVENT
 /* Global vars for handling event proc entry */
 static DEFINE_SPINLOCK(acpi_system_event_lock);
 int event_is_open = 0;
@@ -106,6 +107,7 @@ static const struct file_operations acpi_system_event_ops = {
         .release = acpi_system_close_event,
         .poll = acpi_system_poll_event,
 };
+#endif  /* CONFIG_ACPI_PROC_EVENT */
 
 #ifdef CONFIG_NET
 static unsigned int acpi_event_seqnum;
@@ -247,7 +249,9 @@ static int acpi_event_genetlink_init(void)
 
 static int __init acpi_event_init(void)
 {
+#ifdef CONFIG_ACPI_PROC_EVENT
         struct proc_dir_entry *entry;
+#endif
         int error = 0;
 
         if (acpi_disabled)
@@ -259,12 +263,14 @@ static int __init acpi_event_init(void)
                 printk(KERN_WARNING PREFIX
                        "Failed to create genetlink family for ACPI event\n");
 
+#ifdef CONFIG_ACPI_PROC_EVENT
         /* 'event' [R] */
         entry = create_proc_entry("event", S_IRUSR, acpi_root_dir);
         if (entry)
                 entry->proc_fops = &acpi_system_event_ops;
         else
                 return -ENODEV;
+#endif
 
         return 0;
 }
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index dbc2e5d9d6a7..e944aaee4e06 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -698,7 +698,7 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data)
         switch (event) {
         case ACPI_PROCESSOR_NOTIFY_PERFORMANCE:
                 acpi_processor_ppc_has_changed(pr);
-                acpi_bus_generate_event(device, event,
+                acpi_bus_generate_proc_event(device, event,
                                         pr->performance_platform_limit);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
                                                   device->dev.bus_id, event,
@@ -706,13 +706,13 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data)
                 break;
         case ACPI_PROCESSOR_NOTIFY_POWER:
                 acpi_processor_cst_has_changed(pr);
-                acpi_bus_generate_event(device, event, 0);
+                acpi_bus_generate_proc_event(device, event, 0);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
                                                   device->dev.bus_id, event, 0);
                 break;
         case ACPI_PROCESSOR_NOTIFY_THROTTLING:
                 acpi_processor_tstate_has_changed(pr);
-                acpi_bus_generate_event(device, event, 0);
+                acpi_bus_generate_proc_event(device, event, 0);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
                                                   device->dev.bus_id, event, 0);
         default:
diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index 2d67e92c8ff7..a578986e3214 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -440,7 +440,7 @@ static int acpi_sbs_generate_event(struct acpi_device *device,
         strcpy(acpi_device_bid(device), bid);
         strcpy(acpi_device_class(device), class);
 
-        result = acpi_bus_generate_event(device, event, state);
+        result = acpi_bus_generate_proc_event(device, event, state);
 
         strcpy(acpi_device_bid(device), bid_saved);
         strcpy(acpi_device_class(device), class_saved);
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 291758c9a4d6..2c9cfe297f73 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -485,7 +485,7 @@ static int acpi_thermal_critical(struct acpi_thermal *tz)
         printk(KERN_EMERG
                "Critical temperature reached (%ld C), shutting down.\n",
                KELVIN_TO_CELSIUS(tz->temperature));
-        acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL,
+        acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL,
                                 tz->trips.critical.flags.enabled);
         acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
                                           tz->device->dev.bus_id,
@@ -508,7 +508,7 @@ static int acpi_thermal_hot(struct acpi_thermal *tz)
         } else if (tz->trips.hot.flags.enabled)
                 tz->trips.hot.flags.enabled = 0;
 
-        acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_HOT,
+        acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_HOT,
                                 tz->trips.hot.flags.enabled);
         acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
                                           tz->device->dev.bus_id,
@@ -1157,14 +1157,14 @@ static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
         case ACPI_THERMAL_NOTIFY_THRESHOLDS:
                 acpi_thermal_get_trip_points(tz);
                 acpi_thermal_check(tz);
-                acpi_bus_generate_event(device, event, 0);
+                acpi_bus_generate_proc_event(device, event, 0);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
                                                   device->dev.bus_id, event, 0);
                 break;
         case ACPI_THERMAL_NOTIFY_DEVICES:
                 if (tz->flags.devices)
                         acpi_thermal_get_devices(tz);
-                acpi_bus_generate_event(device, event, 0);
+                acpi_bus_generate_proc_event(device, event, 0);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
                                                   device->dev.bus_id, event, 0);
                 break;
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index d98701941981..9a5cfcfd8da5 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1775,7 +1775,7 @@ static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
         switch (event) {
         case ACPI_VIDEO_NOTIFY_SWITCH:  /* User requested a switch,
                                          * most likely via hotkey. */
-                acpi_bus_generate_event(device, event, 0);
+                acpi_bus_generate_proc_event(device, event, 0);
                 break;
 
         case ACPI_VIDEO_NOTIFY_PROBE:   /* User plugged in or removed a video
@@ -1783,14 +1783,14 @@ static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
                 acpi_video_device_enumerate(video);
                 acpi_video_device_rebind(video);
                 acpi_video_switch_output(video, event);
-                acpi_bus_generate_event(device, event, 0);
+                acpi_bus_generate_proc_event(device, event, 0);
                 break;
 
         case ACPI_VIDEO_NOTIFY_CYCLE:   /* Cycle Display output hotkey pressed. */
         case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:     /* Next Display output hotkey pressed. */
         case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:     /* previous Display output hotkey pressed. */
                 acpi_video_switch_output(video, event);
-                acpi_bus_generate_event(device, event, 0);
+                acpi_bus_generate_proc_event(device, event, 0);
                 break;
 
         default:
@@ -1815,7 +1815,7 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
         switch (event) {
         case ACPI_VIDEO_NOTIFY_SWITCH:  /* change in status (cycle output device) */
         case ACPI_VIDEO_NOTIFY_PROBE:   /* change in status (output device status) */
-                acpi_bus_generate_event(device, event, 0);
+                acpi_bus_generate_proc_event(device, event, 0);
                 break;
         case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:        /* Cycle brightness */
         case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:  /* Increase brightness */
@@ -1823,7 +1823,7 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
         case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
         case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:     /* display device off */
                 acpi_video_switch_brightness(video_device, event);
-                acpi_bus_generate_event(device, event, 0);
+                acpi_bus_generate_proc_event(device, event, 0);
                 break;
         default:
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
diff --git a/drivers/char/sonypi.c b/drivers/char/sonypi.c
index aeec67e27264..859858561ab6 100644
--- a/drivers/char/sonypi.c
+++ b/drivers/char/sonypi.c
@@ -875,7 +875,7 @@ found:
 
 #ifdef CONFIG_ACPI
         if (sonypi_acpi_device)
-                acpi_bus_generate_event(sonypi_acpi_device, 1, event);
+                acpi_bus_generate_proc_event(sonypi_acpi_device, 1, event);
 #endif
 
         kfifo_put(sonypi_device.fifo, (unsigned char *)&event, sizeof(event));
diff --git a/drivers/misc/asus-laptop.c b/drivers/misc/asus-laptop.c
index d0fc4fd212e6..f8ae58f01637 100644
--- a/drivers/misc/asus-laptop.c
+++ b/drivers/misc/asus-laptop.c
@@ -732,7 +732,7 @@ static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
                 lcd_blank(FB_BLANK_POWERDOWN);
         }
 
-        acpi_bus_generate_event(hotk->device, event,
+        acpi_bus_generate_proc_event(hotk->device, event,
                                 hotk->event_count[event % 128]++);
 
         return;
diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
index 91da6880ae93..743bd49ae6f5 100644
--- a/drivers/misc/sony-laptop.c
+++ b/drivers/misc/sony-laptop.c
@@ -904,7 +904,7 @@ static void sony_acpi_notify(acpi_handle handle, u32 event, void *data)
 
         dprintk("sony_acpi_notify, event: 0x%.2x\n", ev);
         sony_laptop_report_input_event(ev);
-        acpi_bus_generate_event(sony_nc_acpi_device, 1, ev);
+        acpi_bus_generate_proc_event(sony_nc_acpi_device, 1, ev);
 }
 
 static acpi_status sony_walk_callback(acpi_handle handle, u32 level,
@@ -2292,7 +2292,7 @@ static irqreturn_t sony_pic_irq(int irq, void *dev_id)
 
 found:
         sony_laptop_report_input_event(device_event);
-        acpi_bus_generate_event(spic_dev.acpi_dev, 1, device_event);
+        acpi_bus_generate_proc_event(spic_dev.acpi_dev, 1, device_event);
         sonypi_compat_report_event(device_event);
 
         return IRQ_HANDLED;
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index d0825a34a7b0..bb8956d0c104 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -1190,10 +1190,10 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
                 }
 
                 if (sendacpi)
-                        acpi_bus_generate_event(ibm->acpi->device, event, hkey);
+                        acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
         } else {
                 printk(IBM_ERR "unknown hotkey notification event %d\n", event);
-                acpi_bus_generate_event(ibm->acpi->device, event, 0);
+                acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
         }
 }
 
@@ -2179,7 +2179,7 @@ static void dock_notify(struct ibm_struct *ibm, u32 event)
                        event, _sta(dock_handle));
                 data = 0;       /* unknown */
         }
-        acpi_bus_generate_event(ibm->acpi->device, event, data);
+        acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
                                           ibm->acpi->device->dev.bus_id,
                                           event, data);
@@ -2280,7 +2280,7 @@ static int __init bay_init(struct ibm_init_struct *iibm)
 
 static void bay_notify(struct ibm_struct *ibm, u32 event)
 {
-        acpi_bus_generate_event(ibm->acpi->device, event, 0);
+        acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
                                           ibm->acpi->device->dev.bus_id,
                                           event, 0);
diff --git a/drivers/pci/hotplug/acpiphp_ibm.c b/drivers/pci/hotplug/acpiphp_ibm.c
index 360902476bad..d2c410cd3c45 100644
--- a/drivers/pci/hotplug/acpiphp_ibm.c
+++ b/drivers/pci/hotplug/acpiphp_ibm.c
@@ -267,7 +267,7 @@ static void ibm_handle_events(acpi_handle handle, u32 event, void *context)
 
         if (subevent == 0x80) {
                 dbg("%s: generationg bus event\n", __FUNCTION__);
-                acpi_bus_generate_event(note->device, note->event, detail);
+                acpi_bus_generate_proc_event(note->device, note->event, detail);
                 acpi_bus_generate_netlink_event(note->device->pnp.device_class,
                                                   note->device->dev.bus_id,
                                                   note->event, detail);
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 8203cddeb4cb..86aea44ce6d4 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -331,8 +331,13 @@ void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context);
 int acpi_bus_get_status(struct acpi_device *device);
 int acpi_bus_get_power(acpi_handle handle, int *state);
 int acpi_bus_set_power(acpi_handle handle, int state);
-int acpi_bus_generate_event(struct acpi_device *device, u8 type, int data);
+#ifdef CONFIG_ACPI_PROC_EVENT
+int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
 int acpi_bus_receive_event(struct acpi_bus_event *event);
+#else
+static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
+        { return 0; }
+#endif
 int acpi_bus_register_driver(struct acpi_driver *driver);
 void acpi_bus_unregister_driver(struct acpi_driver *driver);
 int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,