sysfs: Use one lockdep class per sysfs attribute.

[safe/jmp/linux-2.6] / include / linux / sysfs.h

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 3e85265..006c359 100644 (file)
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -15,6 +15,7 @@
 #include <linux/compiler.h>
 #include <linux/errno.h>
 #include <linux/list.h>
+#include <linux/lockdep.h>
 #include <asm/atomic.h>
 
 struct kobject;
@@ -29,8 +30,23 @@ struct attribute {
        const char              *name;
        struct module           *owner;
        mode_t                  mode;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+       struct lock_class_key   *key;
+       struct lock_class_key   skey;
+#endif
 };
 
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+#define sysfs_attr_init(attr)                          \
+do {                                                   \
+       static struct lock_class_key __key;             \
+                                                       \
+       (attr)->key = &__key;                           \
+} while(0)
+#else
+#define sysfs_attr_init(attr) do {} while(0)
+#endif
+
 struct attribute_group {
        const char              *name;
        mode_t                  (*is_visible)(struct kobject *,
@@ -74,6 +90,8 @@ struct bin_attribute {
                    struct vm_area_struct *vma);
 };
 
+#define sysfs_bin_attr_init(bin_attr) sysfs_attr_init(&bin_attr->attr)
+
 struct sysfs_ops {
        ssize_t (*show)(struct kobject *, struct attribute *,char *);
        ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);