diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c index d2eac3ceed5f31cf9735a68ecc69dc4a6c6771ed..f50e3cc2ded8d76e00d203829108b40647f1fc63 100644 --- a/fs/sysfs/symlink.c +++ b/fs/sysfs/symlink.c @@ -3,6 +3,7 @@ */ #include +#include #include #include #include @@ -82,10 +83,19 @@ static int sysfs_add_link(struct dentry * parent, const char * name, struct kobj */ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name) { - struct dentry * dentry = kobj->dentry; + struct dentry *dentry = NULL; int error = -EEXIST; - BUG_ON(!kobj || !kobj->dentry || !name); + BUG_ON(!name); + + if (!kobj) { + if (sysfs_mount && sysfs_mount->mnt_sb) + dentry = sysfs_mount->mnt_sb->s_root; + } else + dentry = kobj->dentry; + + if (!dentry) + return -EFAULT; mutex_lock(&dentry->d_inode->i_mutex); if (!sysfs_dirent_exist(dentry->d_fsdata, name))