1 files changed, 37 insertions, 2 deletions

diff --git a/include/linux/sysdev.h b/include/linux/sysdev.h
index f2767bc6b73..f395bb3fa2f 100644
--- a/include/linux/sysdev.h
+++ b/include/linux/sysdev.h
@@ -99,8 +99,9 @@ extern void sysdev_unregister(struct sys_device *);
 
 struct sysdev_attribute { 
         struct attribute        attr;
-        ssize_t (*show)(struct sys_device *, char *);
-        ssize_t (*store)(struct sys_device *, const char *, size_t);
+        ssize_t (*show)(struct sys_device *, struct sysdev_attribute *, char *);
+        ssize_t (*store)(struct sys_device *, struct sysdev_attribute *,
+                         const char *, size_t);
 };
 
 
@@ -118,4 +119,38 @@ struct sysdev_attribute {
 extern int sysdev_create_file(struct sys_device *, struct sysdev_attribute *);
 extern void sysdev_remove_file(struct sys_device *, struct sysdev_attribute *);
 
+struct sysdev_ext_attribute {
+        struct sysdev_attribute attr;
+        void *var;
+};
+
+/*
+ * Support for simple variable sysdev attributes.
+ * The pointer to the variable is stored in a sysdev_ext_attribute
+ */
+
+/* Add more types as needed */
+
+extern ssize_t sysdev_show_ulong(struct sys_device *, struct sysdev_attribute *,
+                                char *);
+extern ssize_t sysdev_store_ulong(struct sys_device *,
+                        struct sysdev_attribute *, const char *, size_t);
+extern ssize_t sysdev_show_int(struct sys_device *, struct sysdev_attribute *,
+                                char *);
+extern ssize_t sysdev_store_int(struct sys_device *,
+                        struct sysdev_attribute *, const char *, size_t);
+
+#define _SYSDEV_ULONG_ATTR(_name, _mode, _var)                          \
+        { _SYSDEV_ATTR(_name, _mode, sysdev_show_ulong, sysdev_store_ulong), \
+          &(_var) }
+#define SYSDEV_ULONG_ATTR(_name, _mode, _var)                   \
+        struct sysdev_ext_attribute attr_##_name =              \
+                _SYSDEV_ULONG_ATTR(_name, _mode, _var);
+#define _SYSDEV_INT_ATTR(_name, _mode, _var)                            \
+        { _SYSDEV_ATTR(_name, _mode, sysdev_show_int, sysdev_store_int), \
+          &(_var) }
+#define SYSDEV_INT_ATTR(_name, _mode, _var)                     \
+        struct sysdev_ext_attribute attr_##_name =              \
+                _SYSDEV_INT_ATTR(_name, _mode, _var);
+
 #endif /* _SYSDEV_H_ */