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authorAndi Kleen <andi@firstfloor.org>2010-01-05 12:48:08 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2010-03-07 17:04:48 -0800
commit869dfc875e32fd832385fd52ce54525a10401ed6 (patch)
tree39885759145d7f7c5137fd5e5259181c064ba34c /include/linux/device.h
parent28812fe11a21826ba4c97c6c7971a619987cd912 (diff)
downloadop-kernel-dev-869dfc875e32fd832385fd52ce54525a10401ed6.zip
op-kernel-dev-869dfc875e32fd832385fd52ce54525a10401ed6.tar.gz
driver core: Add class_attr_string for simple read-only string
Several drivers just export a static string as class attributes. Use the new extensible attribute support to define a simple CLASS_ATTR_STRING() macro for this. This will allow to remove code from drivers in followon patches. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/device.h')
-rw-r--r--include/linux/device.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h
index 190f8d3..f95d5bfe 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -265,6 +265,23 @@ extern int __must_check class_create_file(struct class *class,
extern void class_remove_file(struct class *class,
const struct class_attribute *attr);
+/* Simple class attribute that is just a static string */
+
+struct class_attribute_string {
+ struct class_attribute attr;
+ char *str;
+};
+
+/* Currently read-only only */
+#define _CLASS_ATTR_STRING(_name, _mode, _str) \
+ { __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
+#define CLASS_ATTR_STRING(_name, _mode, _str) \
+ struct class_attribute_string class_attr_##_name = \
+ _CLASS_ATTR_STRING(_name, _mode, _str)
+
+extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr,
+ char *buf);
+
struct class_interface {
struct list_head node;
struct class *class;
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