254 static void bpf_tramp_image_free(struct bpf_tramp_image *im)  in bpf_tramp_image_free()  argument
256 	bpf_image_ksym_del(&im->ksym);  in bpf_tramp_image_free()
257 	bpf_jit_free_exec(im->image);  in bpf_tramp_image_free()
259 	percpu_ref_exit(&im->pcref);  in bpf_tramp_image_free()
260 	kfree_rcu(im, rcu);  in bpf_tramp_image_free()
265 	struct bpf_tramp_image *im;  in __bpf_tramp_image_put_deferred()  local
267 	im = container_of(work, struct bpf_tramp_image, work);  in __bpf_tramp_image_put_deferred()
268 	bpf_tramp_image_free(im);  in __bpf_tramp_image_put_deferred()
274 	struct bpf_tramp_image *im;  in __bpf_tramp_image_put_rcu()  local
276 	im = container_of(rcu, struct bpf_tramp_image, rcu);  in __bpf_tramp_image_put_rcu()
277 	INIT_WORK(&im->work, __bpf_tramp_image_put_deferred);  in __bpf_tramp_image_put_rcu()
278 	schedule_work(&im->work);  in __bpf_tramp_image_put_rcu()
284 	struct bpf_tramp_image *im;  in __bpf_tramp_image_release()  local
286 	im = container_of(pcref, struct bpf_tramp_image, pcref);  in __bpf_tramp_image_release()
287 	call_rcu_tasks(&im->rcu, __bpf_tramp_image_put_rcu);  in __bpf_tramp_image_release()
293 	struct bpf_tramp_image *im;  in __bpf_tramp_image_put_rcu_tasks()  local
295 	im = container_of(rcu, struct bpf_tramp_image, rcu);  in __bpf_tramp_image_put_rcu_tasks()
296 	if (im->ip_after_call)  in __bpf_tramp_image_put_rcu_tasks()
298 		percpu_ref_kill(&im->pcref);  in __bpf_tramp_image_put_rcu_tasks()
301 		call_rcu_tasks(&im->rcu, __bpf_tramp_image_put_rcu);  in __bpf_tramp_image_put_rcu_tasks()
304 static void bpf_tramp_image_put(struct bpf_tramp_image *im)  in bpf_tramp_image_put()  argument
332 	if (im->ip_after_call) {  in bpf_tramp_image_put()
333 		int err = bpf_arch_text_poke(im->ip_after_call, BPF_MOD_JUMP,  in bpf_tramp_image_put()
334 					     NULL, im->ip_epilogue);  in bpf_tramp_image_put()
337 			call_rcu_tasks(&im->rcu, __bpf_tramp_image_put_rcu_tasks);  in bpf_tramp_image_put()
339 			percpu_ref_kill(&im->pcref);  in bpf_tramp_image_put()
349 	call_rcu_tasks_trace(&im->rcu, __bpf_tramp_image_put_rcu_tasks);  in bpf_tramp_image_put()
354 	struct bpf_tramp_image *im;  in bpf_tramp_image_alloc()  local
359 	im = kzalloc(sizeof(*im), GFP_KERNEL);  in bpf_tramp_image_alloc()
360 	if (!im)  in bpf_tramp_image_alloc()
368 	im->image = image = bpf_jit_alloc_exec(PAGE_SIZE);  in bpf_tramp_image_alloc()
373 	err = percpu_ref_init(&im->pcref, __bpf_tramp_image_release, 0, GFP_KERNEL);  in bpf_tramp_image_alloc()
377 	ksym = &im->ksym;  in bpf_tramp_image_alloc()
381 	return im;  in bpf_tramp_image_alloc()
384 	bpf_jit_free_exec(im->image);  in bpf_tramp_image_alloc()
388 	kfree(im);  in bpf_tramp_image_alloc()
395 	struct bpf_tramp_image *im;  in bpf_trampoline_update()  local
412 	im = bpf_tramp_image_alloc(tr->key);  in bpf_trampoline_update()
413 	if (IS_ERR(im)) {  in bpf_trampoline_update()
414 		err = PTR_ERR(im);  in bpf_trampoline_update()
441 	err = arch_prepare_bpf_trampoline(im, im->image, im->image + PAGE_SIZE,  in bpf_trampoline_update()
447 	set_memory_rox((long)im->image, 1);  in bpf_trampoline_update()
452 		err = modify_fentry(tr, tr->cur_image->image, im->image, lock_direct_mutex);  in bpf_trampoline_update()
455 		err = register_fentry(tr, im->image);  in bpf_trampoline_update()
467 		/* reset im->image memory attr for arch_prepare_bpf_trampoline */  in bpf_trampoline_update()
468 		set_memory_nx((long)im->image, 1);  in bpf_trampoline_update()
469 		set_memory_rw((long)im->image, 1);  in bpf_trampoline_update()
478 	tr->cur_image = im;  in bpf_trampoline_update()
487 	bpf_tramp_image_free(im);  in bpf_trampoline_update()