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* [PATCH v2] drivers/virt: vm_gen_counter: initial driver implementation
@ 2018-02-25 12:26 Or Idgar
  2018-02-25 12:47 ` Greg KH
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Or Idgar @ 2018-02-25 12:26 UTC (permalink / raw)
  To: linux-kernel, arnd, gregkh; +Cc: oidgar, idgar, ghammer, Or Idgar

From: Or Idgar <oridgar@gmail.com>

This patch is a driver which expose the Virtual Machine Generation ID
via sysfs. The ID is a UUID value used to differentiate between virtual
machines.

The VM-Generation ID is a feature defined by Microsoft (paper:
http://go.microsoft.com/fwlink/?LinkId=260709) and supported by multiple
hypervisor vendors.

Signed-off-by: Or Idgar <oridgar@gmail.com>
---
 Documentation/ABI/testing/sysfs-hypervisor |  13 +++
 drivers/misc/Kconfig                       |   6 ++
 drivers/misc/Makefile                      |   1 +
 drivers/misc/vmgenid.c                     | 140 +++++++++++++++++++++++++++++
 4 files changed, 160 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-hypervisor
 create mode 100644 drivers/misc/vmgenid.c

diff --git a/Documentation/ABI/testing/sysfs-hypervisor b/Documentation/ABI/testing/sysfs-hypervisor
new file mode 100644
index 000000000000..2f9a7b8eab70
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-hypervisor
@@ -0,0 +1,13 @@
+What:		/sys/hypervisor/vm_gen_counter
+Date:		February 2018
+Contact:	Or Idgar <idgar@virtualoco.com>
+		Gal Hammer <ghammer@redhat.com>
+Description:	Expose the virtual machine generation ID. The directory
+		contains two files: "generation_id" and "raw". Both files
+		represent the same information.
+
+		"generation_id" file is a UUID string
+		representation.
+
+		"raw" file is a 128-bit integer
+		representation (binary).
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 03605f8fc0dc..5a74802bdfb4 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -500,6 +500,12 @@ config MISC_RTSX
 	tristate
 	default MISC_RTSX_PCI || MISC_RTSX_USB
 
+config VMGENID
+	tristate "Virtual Machine Generation ID driver"
+	help
+	  This is a Virtual Machine Generation ID driver which provides
+	  a virtual machine unique identifier.
+
 source "drivers/misc/c2port/Kconfig"
 source "drivers/misc/eeprom/Kconfig"
 source "drivers/misc/cb710/Kconfig"
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index c3c8624f4d95..067aa666bb6a 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -57,6 +57,7 @@ obj-$(CONFIG_ASPEED_LPC_SNOOP)	+= aspeed-lpc-snoop.o
 obj-$(CONFIG_PCI_ENDPOINT_TEST)	+= pci_endpoint_test.o
 obj-$(CONFIG_OCXL)		+= ocxl/
 obj-$(CONFIG_MISC_RTSX)		+= cardreader/
+obj-$(CONFIG_VMGENID)		+= vmgenid.o
 
 lkdtm-$(CONFIG_LKDTM)		+= lkdtm_core.o
 lkdtm-$(CONFIG_LKDTM)		+= lkdtm_bugs.o
diff --git a/drivers/misc/vmgenid.c b/drivers/misc/vmgenid.c
new file mode 100644
index 000000000000..6b7ec9bd45e8
--- /dev/null
+++ b/drivers/misc/vmgenid.c
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Virtual Machine Generation ID driver
+ *
+ * Copyright (C) 2018 Red Hat, Inc. All rights reserved.
+ *	Authors:
+ *	  Or Idgar <oridgar@gmail.com>
+ *	  Gal Hammer <ghammer@redhat.com>
+ *
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/kobject.h>
+#include <linux/acpi.h>
+#include <linux/uuid.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Or Idgar <oridgar@gmail.com>");
+MODULE_AUTHOR("Gal Hammer <ghammer@redhat.com>");
+MODULE_DESCRIPTION("Virtual Machine Generation ID");
+MODULE_VERSION("0.1");
+
+ACPI_MODULE_NAME("vmgenid");
+
+static u64 phy_addr;
+
+static ssize_t generation_id_show(struct device *_d,
+			      struct device_attribute *attr, char *buf)
+{
+	uuid_t *uuidp;
+	ssize_t result;
+
+	uuidp = acpi_os_map_memory(phy_addr, sizeof(uuid_t));
+	if (!uuidp)
+		return -EFAULT;
+
+	result = sprintf(buf, "%pUl\n", uuidp);
+	acpi_os_unmap_memory(uuidp, sizeof(uuid_t));
+	return result;
+}
+static DEVICE_ATTR_RO(generation_id);
+
+static ssize_t raw_show(struct device *_d,
+			struct device_attribute *attr,
+			      char *buf)
+{
+	uuid_t *uuidp;
+
+	uuidp = acpi_os_map_memory(phy_addr, sizeof(uuid_t));
+	if (!uuidp)
+		return -EFAULT;
+	memcpy(buf, uuidp, sizeof(uuid_t));
+	acpi_os_unmap_memory(uuidp, sizeof(uuid_t));
+	return sizeof(uuid_t);
+}
+static DEVICE_ATTR_RO(raw);
+
+static struct attribute *vmgenid_attrs[] = {
+	&dev_attr_generation_id.attr,
+	&dev_attr_raw.attr,
+	NULL,
+};
+static const struct attribute_group vmgenid_group = {
+	.name = "vm_gen_counter",
+	.attrs = vmgenid_attrs,
+};
+
+static int get_vmgenid(acpi_handle handle)
+{
+	int i;
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	acpi_status status;
+	union acpi_object *pss;
+	union acpi_object *element;
+
+	status = acpi_evaluate_object(handle, "ADDR", NULL, &buffer);
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status, "Evaluating _ADDR"));
+		return -ENODEV;
+	}
+	pss = buffer.pointer;
+	if (!pss || pss->type != ACPI_TYPE_PACKAGE || pss->package.count != 2)
+		return -EFAULT;
+
+	phy_addr = 0;
+	for (i = 0; i < pss->package.count; i++) {
+		element = &(pss->package.elements[i]);
+		if (element->type != ACPI_TYPE_INTEGER)
+			return -EFAULT;
+		phy_addr |= element->integer.value << i*32;
+	}
+	return 0;
+}
+
+static int acpi_vmgenid_add(struct acpi_device *device)
+{
+	int retval;
+
+	if (!device)
+		return -EINVAL;
+	retval = get_vmgenid(device->handle);
+	if (retval < 0)
+		return retval;
+	return sysfs_create_group(hypervisor_kobj, &vmgenid_group);
+}
+
+static int acpi_vmgenid_remove(struct acpi_device *device)
+{
+	sysfs_remove_group(hypervisor_kobj, &vmgenid_group);
+	return 0;
+}
+
+static const struct acpi_device_id vmgenid_ids[] = {
+	{"QEMUVGID", 0},
+	{"", 0},
+};
+
+static struct acpi_driver acpi_vmgenid_driver = {
+	.name = "vm_gen_counter",
+	.ids = vmgenid_ids,
+	.owner = THIS_MODULE,
+	.ops = {
+		.add = acpi_vmgenid_add,
+		.remove = acpi_vmgenid_remove,
+	}
+};
+
+static int __init vmgenid_init(void)
+{
+	return acpi_bus_register_driver(&acpi_vmgenid_driver);
+}
+
+static void __exit vmgenid_exit(void)
+{
+	acpi_bus_unregister_driver(&acpi_vmgenid_driver);
+}
+
+module_init(vmgenid_init);
+module_exit(vmgenid_exit);
-- 
2.14.3

^ permalink raw reply related	[flat|nested] 4+ messages in thread

* Re: [PATCH v2] drivers/virt: vm_gen_counter: initial driver implementation
  2018-02-25 12:26 [PATCH v2] drivers/virt: vm_gen_counter: initial driver implementation Or Idgar
@ 2018-02-25 12:47 ` Greg KH
  2018-03-01  9:23 ` kbuild test robot
  2018-03-01  9:28 ` kbuild test robot
  2 siblings, 0 replies; 4+ messages in thread
From: Greg KH @ 2018-02-25 12:47 UTC (permalink / raw)
  To: Or Idgar; +Cc: linux-kernel, arnd, oidgar, ghammer, Or Idgar

On Sun, Feb 25, 2018 at 02:26:31PM +0200, Or Idgar wrote:
> From: Or Idgar <oridgar@gmail.com>
> 
> This patch is a driver which expose the Virtual Machine Generation ID
> via sysfs. The ID is a UUID value used to differentiate between virtual
> machines.
> 
> The VM-Generation ID is a feature defined by Microsoft (paper:
> http://go.microsoft.com/fwlink/?LinkId=260709) and supported by multiple
> hypervisor vendors.
> 
> Signed-off-by: Or Idgar <oridgar@gmail.com>
> ---
>  Documentation/ABI/testing/sysfs-hypervisor |  13 +++
>  drivers/misc/Kconfig                       |   6 ++
>  drivers/misc/Makefile                      |   1 +
>  drivers/misc/vmgenid.c                     | 140 +++++++++++++++++++++++++++++
>  4 files changed, 160 insertions(+)
>  create mode 100644 Documentation/ABI/testing/sysfs-hypervisor
>  create mode 100644 drivers/misc/vmgenid.c

What changed from v1?  Always put that below the --- line like
Documentation/SubmittingPatches describes how to do.

v3?

thanks,

greg k-h

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH v2] drivers/virt: vm_gen_counter: initial driver implementation
  2018-02-25 12:26 [PATCH v2] drivers/virt: vm_gen_counter: initial driver implementation Or Idgar
  2018-02-25 12:47 ` Greg KH
@ 2018-03-01  9:23 ` kbuild test robot
  2018-03-01  9:28 ` kbuild test robot
  2 siblings, 0 replies; 4+ messages in thread
From: kbuild test robot @ 2018-03-01  9:23 UTC (permalink / raw)
  To: Or Idgar
  Cc: kbuild-all, linux-kernel, arnd, gregkh, oidgar, idgar, ghammer, Or Idgar

[-- Attachment #1: Type: text/plain, Size: 5501 bytes --]

Hi Or,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on char-misc/char-misc-testing]
[also build test ERROR on v4.16-rc3 next-20180301]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Or-Idgar/drivers-virt-vm_gen_counter-initial-driver-implementation/20180227-050111
config: openrisc-allyesconfig (attached as .config)
compiler: or1k-linux-gcc (GCC) 6.0.0 20160327 (experimental)
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=openrisc 

All errors (new ones prefixed by >>):

   drivers/misc/vmgenid.c: In function 'acpi_vmgenid_add':
   drivers/misc/vmgenid.c:102:29: error: dereferencing pointer to incomplete type 'struct acpi_device'
     retval = get_vmgenid(device->handle);
                                ^~
   drivers/misc/vmgenid.c: At top level:
   drivers/misc/vmgenid.c:114:36: error: array type has incomplete element type 'struct acpi_device_id'
    static const struct acpi_device_id vmgenid_ids[] = {
                                       ^~~~~~~~~~~
   drivers/misc/vmgenid.c:119:15: error: variable 'acpi_vmgenid_driver' has initializer but incomplete type
    static struct acpi_driver acpi_vmgenid_driver = {
                  ^~~~~~~~~~~
>> drivers/misc/vmgenid.c:120:2: error: unknown field 'name' specified in initializer
     .name = "vm_gen_counter",
     ^
   drivers/misc/vmgenid.c:120:10: warning: excess elements in struct initializer
     .name = "vm_gen_counter",
             ^~~~~~~~~~~~~~~~
   drivers/misc/vmgenid.c:120:10: note: (near initialization for 'acpi_vmgenid_driver')
>> drivers/misc/vmgenid.c:121:2: error: unknown field 'ids' specified in initializer
     .ids = vmgenid_ids,
     ^
   drivers/misc/vmgenid.c:121:9: warning: excess elements in struct initializer
     .ids = vmgenid_ids,
            ^~~~~~~~~~~
   drivers/misc/vmgenid.c:121:9: note: (near initialization for 'acpi_vmgenid_driver')
>> drivers/misc/vmgenid.c:122:2: error: unknown field 'owner' specified in initializer
     .owner = THIS_MODULE,
     ^
   In file included from include/linux/linkage.h:7:0,
                    from include/linux/kernel.h:7,
                    from include/linux/list.h:9,
                    from include/linux/module.h:9,
                    from drivers/misc/vmgenid.c:12:
   include/linux/export.h:37:21: warning: excess elements in struct initializer
    #define THIS_MODULE ((struct module *)0)
                        ^
   drivers/misc/vmgenid.c:122:11: note: in expansion of macro 'THIS_MODULE'
     .owner = THIS_MODULE,
              ^~~~~~~~~~~
   include/linux/export.h:37:21: note: (near initialization for 'acpi_vmgenid_driver')
    #define THIS_MODULE ((struct module *)0)
                        ^
   drivers/misc/vmgenid.c:122:11: note: in expansion of macro 'THIS_MODULE'
     .owner = THIS_MODULE,
              ^~~~~~~~~~~
>> drivers/misc/vmgenid.c:123:2: error: unknown field 'ops' specified in initializer
     .ops = {
     ^
   drivers/misc/vmgenid.c:123:9: error: extra brace group at end of initializer
     .ops = {
            ^
   drivers/misc/vmgenid.c:123:9: note: (near initialization for 'acpi_vmgenid_driver')
   drivers/misc/vmgenid.c:123:9: warning: excess elements in struct initializer
   drivers/misc/vmgenid.c:123:9: note: (near initialization for 'acpi_vmgenid_driver')
   drivers/misc/vmgenid.c: In function 'vmgenid_init':
>> drivers/misc/vmgenid.c:131:9: error: implicit declaration of function 'acpi_bus_register_driver' [-Werror=implicit-function-declaration]
     return acpi_bus_register_driver(&acpi_vmgenid_driver);
            ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/misc/vmgenid.c: In function 'vmgenid_exit':
>> drivers/misc/vmgenid.c:136:2: error: implicit declaration of function 'acpi_bus_unregister_driver' [-Werror=implicit-function-declaration]
     acpi_bus_unregister_driver(&acpi_vmgenid_driver);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/misc/vmgenid.c: At top level:
   drivers/misc/vmgenid.c:119:27: error: storage size of 'acpi_vmgenid_driver' isn't known
    static struct acpi_driver acpi_vmgenid_driver = {
                              ^~~~~~~~~~~~~~~~~~~
   drivers/misc/vmgenid.c:114:36: warning: 'vmgenid_ids' defined but not used [-Wunused-variable]
    static const struct acpi_device_id vmgenid_ids[] = {
                                       ^~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/name +120 drivers/misc/vmgenid.c

   113	
 > 114	static const struct acpi_device_id vmgenid_ids[] = {
   115		{"QEMUVGID", 0},
   116		{"", 0},
   117	};
   118	
   119	static struct acpi_driver acpi_vmgenid_driver = {
 > 120		.name = "vm_gen_counter",
 > 121		.ids = vmgenid_ids,
 > 122		.owner = THIS_MODULE,
 > 123		.ops = {
   124			.add = acpi_vmgenid_add,
   125			.remove = acpi_vmgenid_remove,
   126		}
   127	};
   128	
   129	static int __init vmgenid_init(void)
   130	{
 > 131		return acpi_bus_register_driver(&acpi_vmgenid_driver);
   132	}
   133	
   134	static void __exit vmgenid_exit(void)
   135	{
 > 136		acpi_bus_unregister_driver(&acpi_vmgenid_driver);
   137	}
   138	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
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^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH v2] drivers/virt: vm_gen_counter: initial driver implementation
  2018-02-25 12:26 [PATCH v2] drivers/virt: vm_gen_counter: initial driver implementation Or Idgar
  2018-02-25 12:47 ` Greg KH
  2018-03-01  9:23 ` kbuild test robot
@ 2018-03-01  9:28 ` kbuild test robot
  2 siblings, 0 replies; 4+ messages in thread
From: kbuild test robot @ 2018-03-01  9:28 UTC (permalink / raw)
  To: Or Idgar
  Cc: kbuild-all, linux-kernel, arnd, gregkh, oidgar, idgar, ghammer, Or Idgar

[-- Attachment #1: Type: text/plain, Size: 6119 bytes --]

Hi Or,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on char-misc/char-misc-testing]
[also build test ERROR on v4.16-rc3 next-20180228]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Or-Idgar/drivers-virt-vm_gen_counter-initial-driver-implementation/20180227-050111
config: sh-allmodconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=sh 

All errors (new ones prefixed by >>):

   drivers/misc/vmgenid.c: In function 'acpi_vmgenid_add':
>> drivers/misc/vmgenid.c:102:29: error: dereferencing pointer to incomplete type 'struct acpi_device'
     retval = get_vmgenid(device->handle);
                                ^~
   drivers/misc/vmgenid.c: At top level:
>> drivers/misc/vmgenid.c:114:36: error: array type has incomplete element type 'struct acpi_device_id'
    static const struct acpi_device_id vmgenid_ids[] = {
                                       ^~~~~~~~~~~
>> drivers/misc/vmgenid.c:119:15: error: variable 'acpi_vmgenid_driver' has initializer but incomplete type
    static struct acpi_driver acpi_vmgenid_driver = {
                  ^~~~~~~~~~~
>> drivers/misc/vmgenid.c:120:3: error: 'struct acpi_driver' has no member named 'name'
     .name = "vm_gen_counter",
      ^~~~
   drivers/misc/vmgenid.c:120:10: warning: excess elements in struct initializer
     .name = "vm_gen_counter",
             ^~~~~~~~~~~~~~~~
   drivers/misc/vmgenid.c:120:10: note: (near initialization for 'acpi_vmgenid_driver')
>> drivers/misc/vmgenid.c:121:3: error: 'struct acpi_driver' has no member named 'ids'
     .ids = vmgenid_ids,
      ^~~
   drivers/misc/vmgenid.c:121:9: warning: excess elements in struct initializer
     .ids = vmgenid_ids,
            ^~~~~~~~~~~
   drivers/misc/vmgenid.c:121:9: note: (near initialization for 'acpi_vmgenid_driver')
>> drivers/misc/vmgenid.c:122:3: error: 'struct acpi_driver' has no member named 'owner'
     .owner = THIS_MODULE,
      ^~~~~
   In file included from include/linux/linkage.h:7:0,
                    from include/linux/kernel.h:7,
                    from include/linux/list.h:9,
                    from include/linux/module.h:9,
                    from drivers/misc/vmgenid.c:12:
   include/linux/export.h:35:21: warning: excess elements in struct initializer
    #define THIS_MODULE (&__this_module)
                        ^
   drivers/misc/vmgenid.c:122:11: note: in expansion of macro 'THIS_MODULE'
     .owner = THIS_MODULE,
              ^~~~~~~~~~~
   include/linux/export.h:35:21: note: (near initialization for 'acpi_vmgenid_driver')
    #define THIS_MODULE (&__this_module)
                        ^
   drivers/misc/vmgenid.c:122:11: note: in expansion of macro 'THIS_MODULE'
     .owner = THIS_MODULE,
              ^~~~~~~~~~~
>> drivers/misc/vmgenid.c:123:3: error: 'struct acpi_driver' has no member named 'ops'
     .ops = {
      ^~~
>> drivers/misc/vmgenid.c:123:9: error: extra brace group at end of initializer
     .ops = {
            ^
   drivers/misc/vmgenid.c:123:9: note: (near initialization for 'acpi_vmgenid_driver')
   drivers/misc/vmgenid.c:123:9: warning: excess elements in struct initializer
   drivers/misc/vmgenid.c:123:9: note: (near initialization for 'acpi_vmgenid_driver')
   drivers/misc/vmgenid.c: In function 'vmgenid_init':
>> drivers/misc/vmgenid.c:131:9: error: implicit declaration of function 'acpi_bus_register_driver'; did you mean 'acpi_nvs_register'? [-Werror=implicit-function-declaration]
     return acpi_bus_register_driver(&acpi_vmgenid_driver);
            ^~~~~~~~~~~~~~~~~~~~~~~~
            acpi_nvs_register
   drivers/misc/vmgenid.c: In function 'vmgenid_exit':
>> drivers/misc/vmgenid.c:136:2: error: implicit declaration of function 'acpi_bus_unregister_driver'; did you mean 'bus_unregister_notifier'? [-Werror=implicit-function-declaration]
     acpi_bus_unregister_driver(&acpi_vmgenid_driver);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~
     bus_unregister_notifier
   drivers/misc/vmgenid.c: At top level:
>> drivers/misc/vmgenid.c:119:27: error: storage size of 'acpi_vmgenid_driver' isn't known
    static struct acpi_driver acpi_vmgenid_driver = {
                              ^~~~~~~~~~~~~~~~~~~
   drivers/misc/vmgenid.c:114:36: warning: 'vmgenid_ids' defined but not used [-Wunused-variable]
    static const struct acpi_device_id vmgenid_ids[] = {
                                       ^~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +102 drivers/misc/vmgenid.c

    95	
    96	static int acpi_vmgenid_add(struct acpi_device *device)
    97	{
    98		int retval;
    99	
   100		if (!device)
   101			return -EINVAL;
 > 102		retval = get_vmgenid(device->handle);
   103		if (retval < 0)
   104			return retval;
   105		return sysfs_create_group(hypervisor_kobj, &vmgenid_group);
   106	}
   107	
   108	static int acpi_vmgenid_remove(struct acpi_device *device)
   109	{
   110		sysfs_remove_group(hypervisor_kobj, &vmgenid_group);
   111		return 0;
   112	}
   113	
 > 114	static const struct acpi_device_id vmgenid_ids[] = {
   115		{"QEMUVGID", 0},
   116		{"", 0},
   117	};
   118	
 > 119	static struct acpi_driver acpi_vmgenid_driver = {
 > 120		.name = "vm_gen_counter",
 > 121		.ids = vmgenid_ids,
 > 122		.owner = THIS_MODULE,
 > 123		.ops = {
   124			.add = acpi_vmgenid_add,
   125			.remove = acpi_vmgenid_remove,
   126		}
   127	};
   128	
   129	static int __init vmgenid_init(void)
   130	{
 > 131		return acpi_bus_register_driver(&acpi_vmgenid_driver);
   132	}
   133	
   134	static void __exit vmgenid_exit(void)
   135	{
 > 136		acpi_bus_unregister_driver(&acpi_vmgenid_driver);
   137	}
   138	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2018-03-01  9:28 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-02-25 12:26 [PATCH v2] drivers/virt: vm_gen_counter: initial driver implementation Or Idgar
2018-02-25 12:47 ` Greg KH
2018-03-01  9:23 ` kbuild test robot
2018-03-01  9:28 ` kbuild test robot

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