fsfreeze: use sb_start_write_killable instead of sb_start_write

index 8c74100..d621d76 100644
@@ -182,7 +182,9 @@ static long do_sys_ftruncate(unsigned int fd, loff_t length, int small)
 	if (IS_APPEND(inode))
 		goto out_putf;
 
-	sb_start_write(inode->i_sb);
+	error = sb_start_write_killable(inode->i_sb);
+	if (error < 0)
+		return error;
 	error = locks_verify_truncate(inode, f.file, length);
 	if (!error)
 		error = security_path_truncate(&f.file->f_path);

@@ -273,7 +275,9 @@ int do_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
 	if (!file->f_op->fallocate)
 		return -EOPNOTSUPP;
 
-	sb_start_write(inode->i_sb);
+	ret = sb_start_write_killable(inode->i_sb);
+	if (ret < 0)
+		return ret;
 	ret = file->f_op->fallocate(file, mode, offset, len);
 	sb_end_write(inode->i_sb);
 	return ret;