driver core: Convert some drivers to CLASS_ATTR_STRING

Convert some drivers who export a single string as class attribute
to the new class_attr_string functions. This removes redundant
code all over.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

6 files changed, 27 insertions, 57 deletions

diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index b95aaf23596e..014ce24761b9 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -70,20 +70,17 @@ static int drm_class_resume(struct device *dev)
         return 0;
 }
 
-/* Display the version of drm_core. This doesn't work right in current design */
-static ssize_t version_show(struct class *dev, struct class_attribute *attr,
-                                char *buf)
-{
-        return sprintf(buf, "%s %d.%d.%d %s\n", CORE_NAME, CORE_MAJOR,
-                       CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
-}
-
 static char *drm_devnode(struct device *dev, mode_t *mode)
 {
         return kasprintf(GFP_KERNEL, "dri/%s", dev_name(dev));
 }
 
-static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
+static CLASS_ATTR_STRING(version, S_IRUGO,
+                CORE_NAME " "
+                __stringify(CORE_MAJOR) "."
+                __stringify(CORE_MINOR) "."
+                __stringify(CORE_PATCHLEVEL) " "
+                CORE_DATE);
 
 /**
  * drm_sysfs_create - create a struct drm_sysfs_class structure
@@ -110,7 +107,7 @@ struct class *drm_sysfs_create(struct module *owner, char *name)
         class->suspend = drm_class_suspend;
         class->resume = drm_class_resume;
 
-        err = class_create_file(class, &class_attr_version);
+        err = class_create_file(class, &class_attr_version.attr);
         if (err)
                 goto err_out_class;
 
@@ -133,7 +130,7 @@ void drm_sysfs_destroy(void)
 {
         if ((drm_class == NULL) || (IS_ERR(drm_class)))
                 return;
-        class_remove_file(drm_class, &class_attr_version);
+        class_remove_file(drm_class, &class_attr_version.attr);
         class_destroy(drm_class);
 }
 
diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c
index 02e209ff33fd..017d6e24448f 100644
--- a/drivers/infiniband/core/ucm.c
+++ b/drivers/infiniband/core/ucm.c
@@ -1336,13 +1336,8 @@ static void ib_ucm_remove_one(struct ib_device *device)
         device_unregister(&ucm_dev->dev);
 }
 
-static ssize_t show_abi_version(struct class *class,
-                                struct class_attribute *attr,
-                                char *buf)
-{
-        return sprintf(buf, "%d\n", IB_USER_CM_ABI_VERSION);
-}
-static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
+static CLASS_ATTR_STRING(abi_version, S_IRUGO,
+                         __stringify(IB_USER_CM_ABI_VERSION));
 
 static int __init ib_ucm_init(void)
 {
@@ -1355,7 +1350,7 @@ static int __init ib_ucm_init(void)
                 goto error1;
         }
 
-        ret = class_create_file(&cm_class, &class_attr_abi_version);
+        ret = class_create_file(&cm_class, &class_attr_abi_version.attr);
         if (ret) {
                 printk(KERN_ERR "ucm: couldn't create abi_version attribute\n");
                 goto error2;
@@ -1369,7 +1364,7 @@ static int __init ib_ucm_init(void)
         return 0;
 
 error3:
-        class_remove_file(&cm_class, &class_attr_abi_version);
+        class_remove_file(&cm_class, &class_attr_abi_version.attr);
 error2:
         unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES);
 error1:
@@ -1379,7 +1374,7 @@ error1:
 static void __exit ib_ucm_cleanup(void)
 {
         ib_unregister_client(&ucm_client);
-        class_remove_file(&cm_class, &class_attr_abi_version);
+        class_remove_file(&cm_class, &class_attr_abi_version.attr);
         unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES);
         if (overflow_maj)
                 unregister_chrdev_region(overflow_maj, IB_UCM_MAX_DEVICES);
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index d0de8f265f45..04b585e86cb2 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -965,13 +965,8 @@ static ssize_t show_port(struct device *dev, struct device_attribute *attr,
 }
 static DEVICE_ATTR(port, S_IRUGO, show_port, NULL);
 
-static ssize_t show_abi_version(struct class *class,
-                                struct class_attribute *attr,
-                                char *buf)
-{
-        return sprintf(buf, "%d\n", IB_USER_MAD_ABI_VERSION);
-}
-static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
+static CLASS_ATTR_STRING(abi_version, S_IRUGO,
+                         __stringify(IB_USER_MAD_ABI_VERSION));
 
 static dev_t overflow_maj;
 static DECLARE_BITMAP(overflow_map, IB_UMAD_MAX_PORTS);
@@ -1196,7 +1191,7 @@ static int __init ib_umad_init(void)
                 goto out_chrdev;
         }
 
-        ret = class_create_file(umad_class, &class_attr_abi_version);
+        ret = class_create_file(umad_class, &class_attr_abi_version.attr);
         if (ret) {
                 printk(KERN_ERR "user_mad: couldn't create abi_version attribute\n");
                 goto out_class;
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index 60879399207a..d805cf365c8d 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -691,13 +691,8 @@ static ssize_t show_dev_abi_version(struct device *device,
 }
 static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
 
-static ssize_t show_abi_version(struct class *class,
-                                struct class_attribute *attr,
-                                char *buf)
-{
-        return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION);
-}
-static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
+static CLASS_ATTR_STRING(abi_version, S_IRUGO,
+                         __stringify(IB_USER_VERBS_ABI_VERSION));
 
 static dev_t overflow_maj;
 static DECLARE_BITMAP(overflow_map, IB_UVERBS_MAX_DEVICES);
@@ -843,7 +838,7 @@ static int __init ib_uverbs_init(void)
                 goto out_chrdev;
         }
 
-        ret = class_create_file(uverbs_class, &class_attr_abi_version);
+        ret = class_create_file(uverbs_class, &class_attr_abi_version.attr);
         if (ret) {
                 printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n");
                 goto out_class;
diff --git a/drivers/misc/phantom.c b/drivers/misc/phantom.c
index d30ae9560309..779aa8ebe4cf 100644
--- a/drivers/misc/phantom.c
+++ b/drivers/misc/phantom.c
@@ -497,12 +497,7 @@ static struct pci_driver phantom_pci_driver = {
         .resume = phantom_resume
 };
 
-static ssize_t phantom_show_version(struct class *cls, struct class_attribute *attr, char *buf)
-{
-        return sprintf(buf, PHANTOM_VERSION "\n");
-}
-
-static CLASS_ATTR(version, 0444, phantom_show_version, NULL);
+static CLASS_ATTR_STRING(version, 0444, PHANTOM_VERSION);
 
 static int __init phantom_init(void)
 {
@@ -515,7 +510,7 @@ static int __init phantom_init(void)
                 printk(KERN_ERR "phantom: can't register phantom class\n");
                 goto err;
         }
-        retval = class_create_file(phantom_class, &class_attr_version);
+        retval = class_create_file(phantom_class, &class_attr_version.attr);
         if (retval) {
                 printk(KERN_ERR "phantom: can't create sysfs version file\n");
                 goto err_class;
@@ -541,7 +536,7 @@ static int __init phantom_init(void)
 err_unchr:
         unregister_chrdev_region(dev, PHANTOM_MAX_MINORS);
 err_attr:
-        class_remove_file(phantom_class, &class_attr_version);
+        class_remove_file(phantom_class, &class_attr_version.attr);
 err_class:
         class_destroy(phantom_class);
 err:
@@ -554,7 +549,7 @@ static void __exit phantom_exit(void)
 
         unregister_chrdev_region(MKDEV(phantom_major, 0), PHANTOM_MAX_MINORS);
 
-        class_remove_file(phantom_class, &class_attr_version);
+        class_remove_file(phantom_class, &class_attr_version.attr);
         class_destroy(phantom_class);
 
         pr_debug("phantom: module successfully removed\n");
diff --git a/drivers/staging/asus_oled/asus_oled.c b/drivers/staging/asus_oled/asus_oled.c
index 7d93f50a0a64..7ebecc92c61b 100644
--- a/drivers/staging/asus_oled/asus_oled.c
+++ b/drivers/staging/asus_oled/asus_oled.c
@@ -770,15 +770,8 @@ static struct usb_driver oled_driver = {
         .id_table =     id_table,
 };
 
-static ssize_t version_show(struct class *dev,
-                            struct class_attribute *attr,
-                            char *buf)
-{
-        return sprintf(buf, ASUS_OLED_UNDERSCORE_NAME " %s\n",
-                       ASUS_OLED_VERSION);
-}
-
-static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
+static CLASS_ATTR_STRING(version, S_IRUGO,
+                        ASUS_OLED_UNDERSCORE_NAME " " ASUS_OLED_VERSION);
 
 static int __init asus_oled_init(void)
 {
@@ -790,7 +783,7 @@ static int __init asus_oled_init(void)
                 return PTR_ERR(oled_class);
         }
 
-        retval = class_create_file(oled_class, &class_attr_version);
+        retval = class_create_file(oled_class, &class_attr_version.attr);
         if (retval) {
                 err("Error creating class version file");
                 goto error;
@@ -812,7 +805,7 @@ error:
 
 static void __exit asus_oled_exit(void)
 {
-        class_remove_file(oled_class, &class_attr_version);
+        class_remove_file(oled_class, &class_attr_version.attr);
         class_destroy(oled_class);
 
         usb_deregister(&oled_driver);