diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index c3e634924149e5ed89d0c2418df970830f626204..b69ad1305b71ac6b3f9625c0b71d2d3bd5e5d26a 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -4130,6 +4130,7 @@ void btrfs_test_inode_set_ops(struct inode *inode);
 
 /* ioctl.c */
 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
+int btrfs_ioctl_get_supported_features(void __user *arg);
 void btrfs_update_iflags(struct inode *inode);
 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
 int btrfs_is_empty_uuid(u8 *uuid);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index c1193b0c5e490c5fb7fe9cd6aa2e68ba1d5d2168..86249cf78897f7b49a3df983e534faed5fa04a3c 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -5257,8 +5257,7 @@ static int btrfs_ioctl_set_fslabel(struct file *file, void __user *arg)
 	  .compat_ro_flags = BTRFS_FEATURE_COMPAT_RO_##suffix, \
 	  .incompat_flags = BTRFS_FEATURE_INCOMPAT_##suffix }
 
-static int btrfs_ioctl_get_supported_features(struct file *file,
-					      void __user *arg)
+int btrfs_ioctl_get_supported_features(void __user *arg)
 {
 	static const struct btrfs_ioctl_feature_flags features[3] = {
 		INIT_FEATURE_FLAGS(SUPP),
@@ -5537,7 +5536,7 @@ long btrfs_ioctl(struct file *file, unsigned int
 	case BTRFS_IOC_SET_FSLABEL:
 		return btrfs_ioctl_set_fslabel(file, argp);
 	case BTRFS_IOC_GET_SUPPORTED_FEATURES:
-		return btrfs_ioctl_get_supported_features(file, argp);
+		return btrfs_ioctl_get_supported_features(argp);
 	case BTRFS_IOC_GET_FEATURES:
 		return btrfs_ioctl_get_features(file, argp);
 	case BTRFS_IOC_SET_FEATURES:
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index bf75200c6f86fb765c3607772cee727931b5e70a..a958f625793bc18466b8110513a77689d4604ce5 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -2190,6 +2190,9 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
 			break;
 		ret = !(fs_devices->num_devices == fs_devices->total_devices);
 		break;
+	case BTRFS_IOC_GET_SUPPORTED_FEATURES:
+		ret = btrfs_ioctl_get_supported_features((void __user*)arg);
+		break;
 	}
 
 	kfree(vol);