scsi: sysfs: Introduce sysfs_{un,}break_active_protection()

Introduce these two functions and export them such that the next patch
can add calls to these functions from the SCSI core.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index b8bfdc173ec0..3c12198c0103 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -237,6 +237,9 @@ int __must_check sysfs_create_files(struct kobject *kobj,
                                    const struct attribute **attr);
 int __must_check sysfs_chmod_file(struct kobject *kobj,
                                   const struct attribute *attr, umode_t mode);
+struct kernfs_node *sysfs_break_active_protection(struct kobject *kobj,
+                                                  const struct attribute *attr);
+void sysfs_unbreak_active_protection(struct kernfs_node *kn);
 void sysfs_remove_file_ns(struct kobject *kobj, const struct attribute *attr,
                           const void *ns);
 bool sysfs_remove_file_self(struct kobject *kobj, const struct attribute *attr);
@@ -350,6 +353,17 @@ static inline int sysfs_chmod_file(struct kobject *kobj,
         return 0;
 }
 
+static inline struct kernfs_node *
+sysfs_break_active_protection(struct kobject *kobj,
+                              const struct attribute *attr)
+{
+        return NULL;
+}
+
+static inline void sysfs_unbreak_active_protection(struct kernfs_node *kn)
+{
+}
+
 static inline void sysfs_remove_file_ns(struct kobject *kobj,
                                         const struct attribute *attr,
                                         const void *ns)