On Tue, 2024-08-20 at 18:53 -0700, Haitao Huang wrote: > -static struct misc_cg *parent_misc(struct misc_cg *cgroup) > +struct misc_cg *misc_cg_root(void) > { > - return cgroup ? css_misc(cgroup->css.parent) : NULL; > + return &root_cg; > } > +EXPORT_SYMBOL_GPL(misc_cg_root); > This doesn't need to be exported. SGX driver cannot be a module. I tested building the this series with this export removed and the kernel could be built successfully.