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From:   "Rafael J. Wysocki" <rjw@rjwysocki.net>
To:     Linux ACPI <linux-acpi@vger.kernel.org>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        Stefano Stabellini <sstabellini@kernel.org>,
        Juergen Gross <jgross@suse.com>, xen-devel@lists.xenproject.org
Subject: [PATCH v1] xen: ACPI: Get rid of ACPICA message printing
Date:   Wed, 24 Feb 2021 19:47:15 +0100
Message-ID: <1709720.Zl72FGBfpD@kreacher>
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From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

The ACPI_DEBUG_PRINT() macro is used in a few places in
xen-acpi-cpuhotplug.c and xen-acpi-memhotplug.c for printing debug
messages, but that is questionable, because that macro belongs to
ACPICA and it should not be used elsewhere.  In addition,
ACPI_DEBUG_PRINT() requires special enabling to allow it to actually
print the message and the _COMPONENT symbol generally needed for
that is not defined in any of the files in question.

For this reason, replace all of the ACPI_DEBUG_PRINT() instances in
the Xen code with acpi_handle_debug() (with the additional benefit
that the source object can be identified more easily after this
change) and drop the ACPI_MODULE_NAME() definitions that are only
used by the ACPICA message printing macros from that code.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/xen/xen-acpi-cpuhotplug.c |   12 +++++-------
 drivers/xen/xen-acpi-memhotplug.c |   16 +++++++---------
 2 files changed, 12 insertions(+), 16 deletions(-)

Index: linux-pm/drivers/xen/xen-acpi-cpuhotplug.c
===================================================================
--- linux-pm.orig/drivers/xen/xen-acpi-cpuhotplug.c
+++ linux-pm/drivers/xen/xen-acpi-cpuhotplug.c
@@ -242,10 +242,10 @@ static void acpi_processor_hotplug_notif
 	switch (event) {
 	case ACPI_NOTIFY_BUS_CHECK:
 	case ACPI_NOTIFY_DEVICE_CHECK:
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+		acpi_handle_debug(handle,
 			"Processor driver received %s event\n",
 			(event == ACPI_NOTIFY_BUS_CHECK) ?
-			"ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"));
+			"ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK");
 
 		if (!is_processor_present(handle))
 			break;
@@ -269,8 +269,8 @@ static void acpi_processor_hotplug_notif
 		break;
 
 	case ACPI_NOTIFY_EJECT_REQUEST:
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-				  "received ACPI_NOTIFY_EJECT_REQUEST\n"));
+		acpi_handle_debug(handle,
+				  "received ACPI_NOTIFY_EJECT_REQUEST\n");
 
 		if (acpi_bus_get_device(handle, &device)) {
 			pr_err(PREFIX "Device don't exist, dropping EJECT\n");
@@ -290,8 +290,7 @@ static void acpi_processor_hotplug_notif
 		break;
 
 	default:
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-				  "Unsupported event [0x%x]\n", event));
+		acpi_handle_debug(handle, "Unsupported event [0x%x]\n", event);
 
 		/* non-hotplug event; possibly handled by other handler */
 		goto out;
@@ -440,7 +439,6 @@ static void __exit xen_acpi_processor_ex
 
 module_init(xen_acpi_processor_init);
 module_exit(xen_acpi_processor_exit);
-ACPI_MODULE_NAME("xen-acpi-cpuhotplug");
 MODULE_AUTHOR("Liu Jinsong <jinsong.liu@intel.com>");
 MODULE_DESCRIPTION("Xen Hotplug CPU Driver");
 MODULE_LICENSE("GPL");
Index: linux-pm/drivers/xen/xen-acpi-memhotplug.c
===================================================================
--- linux-pm.orig/drivers/xen/xen-acpi-memhotplug.c
+++ linux-pm/drivers/xen/xen-acpi-memhotplug.c
@@ -227,13 +227,13 @@ static void acpi_memory_device_notify(ac
 
 	switch (event) {
 	case ACPI_NOTIFY_BUS_CHECK:
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			"\nReceived BUS CHECK notification for device\n"));
+		acpi_handle_debug(handle,
+			"Received BUS CHECK notification for device\n");
 		fallthrough;
 	case ACPI_NOTIFY_DEVICE_CHECK:
 		if (event == ACPI_NOTIFY_DEVICE_CHECK)
-			ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			"\nReceived DEVICE CHECK notification for device\n"));
+			acpi_handle_debug(handle,
+			"Received DEVICE CHECK notification for device\n");
 
 		if (acpi_memory_get_device(handle, &mem_device)) {
 			pr_err(PREFIX "Cannot find driver data\n");
@@ -244,8 +244,8 @@ static void acpi_memory_device_notify(ac
 		break;
 
 	case ACPI_NOTIFY_EJECT_REQUEST:
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			"\nReceived EJECT REQUEST notification for device\n"));
+		acpi_handle_debug(handle,
+			"Received EJECT REQUEST notification for device\n");
 
 		acpi_scan_lock_acquire();
 		if (acpi_bus_get_device(handle, &device)) {
@@ -269,8 +269,7 @@ static void acpi_memory_device_notify(ac
 		break;
 
 	default:
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-				  "Unsupported event [0x%x]\n", event));
+		acpi_handle_debug(handle, "Unsupported event [0x%x]\n", event);
 		/* non-hotplug event; possibly handled by other handler */
 		return;
 	}
@@ -469,7 +468,6 @@ static void __exit xen_acpi_memory_devic
 
 module_init(xen_acpi_memory_device_init);
 module_exit(xen_acpi_memory_device_exit);
-ACPI_MODULE_NAME("xen-acpi-memhotplug");
 MODULE_AUTHOR("Liu Jinsong <jinsong.liu@intel.com>");
 MODULE_DESCRIPTION("Xen Hotplug Mem Driver");
 MODULE_LICENSE("GPL");