31 static int count_samples(struct evlist *evlist, int *sample_count,  in count_samples()  argument
36 	for (i = 0; i < evlist->core.nr_mmaps; i++) {  in count_samples()
37 		struct mmap *map = &evlist->overwrite_mmap[i];  in count_samples()
61 static int do_test(struct evlist *evlist, int mmap_pages,  in do_test()  argument
67 	err = evlist__mmap(evlist, mmap_pages);  in do_test()
74 	evlist__enable(evlist);  in do_test()
76 	evlist__disable(evlist);  in do_test()
78 	err = count_samples(evlist, sample_count, comm_count);  in do_test()
79 	evlist__munmap(evlist);  in do_test()
88 	struct evlist *evlist;  in test__backward_ring_buffer()  local
105 	evlist = evlist__new();  in test__backward_ring_buffer()
106 	if (!evlist) {  in test__backward_ring_buffer()
111 	err = perf_evlist__create_maps(evlist, &opts.target);  in test__backward_ring_buffer()
122 	err = parse_events(evlist, "syscalls:sys_enter_prctl/overwrite/", &parse_error);  in test__backward_ring_buffer()
129 	perf_evlist__config(evlist, &opts, NULL);  in test__backward_ring_buffer()
131 	err = evlist__open(evlist);  in test__backward_ring_buffer()
139 	err = do_test(evlist, opts.mmap_pages, &sample_count,  in test__backward_ring_buffer()
150 	err = do_test(evlist, 1, &sample_count, &comm_count);  in test__backward_ring_buffer()
156 	evlist__delete(evlist);  in test__backward_ring_buffer()