grub_get_rootfsd
if ((fsd = grub_get_rootfsd(&barg->gb_root)) == NULL)
return (grub_get_rootfsd(&ent->ge_barg.gb_root));
(fsd = grub_get_rootfsd(&barg->gb_root)) == NULL)
grub_fsdesc_t *grub_get_rootfsd(const grub_root_t *);