perf trace: Make "--call-graph" affect just "raw_syscalls:sys_exit"

		goto out_delete_evlist;

	}

	perf_evlist__config(evlist, &trace->opts, &callchain_param);

	perf_evlist__config(evlist, &trace->opts, NULL);

	if (trace->opts.callgraph_set && trace->syscalls.events.sys_exit) {

		perf_evsel__config_callchain(trace->syscalls.events.sys_exit,

					     &trace->opts, &callchain_param);

               /*

                * Now we have evsels with different sample_ids, use

                * PERF_SAMPLE_IDENTIFIER to map from sample to evsel

                * from a fixed position in each ring buffer record.

                *

                * As of this the changeset introducing this comment, this

                * isn't strictly needed, as the fields that can come before

                * PERF_SAMPLE_ID are all used, but we'll probably disable

                * some of those for things like copying the payload of

                * pointer syscall arguments, and for vfs_getname we don't

                * need PERF_SAMPLE_ADDR and PERF_SAMPLE_IP, so do this

                * here as a warning we need to use PERF_SAMPLE_IDENTIFIER.

                */

		perf_evlist__set_sample_bit(evlist, IDENTIFIER);

		perf_evlist__reset_sample_bit(evlist, ID);

	}

	signal(SIGCHLD, sig_handler);

	signal(SIGINT, sig_handler);