> @@ -740,6 +809,14 @@ int klp_register_patch(struct klp_patch *patch) > return -ENODEV; > > /* > + * Architectures without reliable stack traces have to set > + * patch->immediate because there's currently no way to patch kthreads > + * with the consistency model. > + */ > + if (!klp_have_reliable_stack() && !patch->immediate) > + return -ENOSYS; > +
I think an error message (pr_err) would be appropriate here. $ insmod patch_1.ko insmod: ERROR: could not insert module patch_1.ko: Function not implemented is not helpful much :) Miroslav
