2 files changed, 23 insertions, 2 deletions

diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 7db6884f4206..37e0e086233c 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -92,9 +92,12 @@ static inline unsigned int sysfs_type(struct sysfs_dirent *sd)
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 #define sysfs_dirent_init_lockdep(sd)                           \
 do {                                                            \
-        static struct lock_class_key __key;                     \
+        struct attribute *attr = sd->s_attr.attr;               \
+        struct lock_class_key *key = attr->key;                 \
+        if (!key)                                               \
+                key = &attr->skey;                              \
                                                                 \
-        lockdep_init_map(&sd->dep_map, "s_active", &__key, 0);  \
+        lockdep_init_map(&sd->dep_map, "s_active", key, 0);     \
 } while(0)
 #else
 #define sysfs_dirent_init_lockdep(sd) do {} while(0)
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 3e8526582146..006c359e63c0 100644
--- 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);