ACPI: glue: Clean up the printing messages

Remove the in house ACPI_GLUE_DEBUG and its related debug message
printing, using pr_debug() instead.

While at it, replace printk() with pr_* to simplify the code.
Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/glue.c

@@ -6,6 +6,8 @@
  * Copyright (c) 2005 Intel Corp.
  */
 
+#define pr_fmt(fmt) "ACPI: " fmt
+
 #include <linux/acpi_iort.h>
 #include <linux/export.h>
 #include <linux/init.h>
@@ -19,17 +21,6 @@
 
 #include "internal.h"
 
-#define ACPI_GLUE_DEBUG	0
-#if ACPI_GLUE_DEBUG
-#define DBG(fmt, ...)						\
-	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__)
-#else
-#define DBG(fmt, ...)						\
-do {								\
-	if (0)							\
-		printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__);	\
-} while (0)
-#endif
 static LIST_HEAD(bus_type_list);
 static DECLARE_RWSEM(bus_type_sem);
 
@@ -44,7 +35,7 @@ int register_acpi_bus_type(struct acpi_bus_type *type)
 		down_write(&bus_type_sem);
 		list_add_tail(&type->list, &bus_type_list);
 		up_write(&bus_type_sem);
-		printk(KERN_INFO PREFIX "bus type %s registered\n", type->name);
+		pr_info("bus type %s registered\n", type->name);
 		return 0;
 	}
 	return -ENODEV;
@@ -59,8 +50,7 @@ int unregister_acpi_bus_type(struct acpi_bus_type *type)
 		down_write(&bus_type_sem);
 		list_del_init(&type->list);
 		up_write(&bus_type_sem);
-		printk(KERN_INFO PREFIX "bus type %s unregistered\n",
-		       type->name);
+		pr_info("bus type %s unregistered\n", type->name);
 		return 0;
 	}
 	return -ENODEV;
@@ -307,7 +297,7 @@ static int acpi_device_notify(struct device *dev)
 
 		adev = type->find_companion(dev);
 		if (!adev) {
-			DBG("Unable to get handle for %s\n", dev_name(dev));
+			pr_debug("Unable to get handle for %s\n", dev_name(dev));
 			ret = -ENODEV;
 			goto out;
 		}
@@ -328,16 +318,15 @@ static int acpi_device_notify(struct device *dev)
 		adev->handler->bind(dev);
 
  out:
-#if ACPI_GLUE_DEBUG
 	if (!ret) {
 		struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 
 		acpi_get_name(ACPI_HANDLE(dev), ACPI_FULL_PATHNAME, &buffer);
-		DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
+		pr_debug("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
 		kfree(buffer.pointer);
-	} else
-		DBG("Device %s -> No ACPI support\n", dev_name(dev));
-#endif
+	} else {
+		pr_debug("Device %s -> No ACPI support\n", dev_name(dev));
+	}
 
 	return ret;
 }