The old _do_fork() helper is removed in favor of the new kernel_clone() helper.
The latter adheres to naming conventions for kernel internal syscall helpers.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: uclinux-h8-devel@lists.sourceforge.jp
Link: https://lore.kernel.org/r/20200819104655.436656-3-christian.brauner@ubuntu.com
        kargs.exit_signal       = (lower_32_bits(clone_flags) & CSIGNAL);
        kargs.stack             = newsp;
 
-       return _do_fork(&kargs);
+       return kernel_clone(&kargs);
 }