1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/bpf.h> 3 #include <bpf/bpf_tracing.h> 4 5 char LICENSE[] SEC("license") = "GPL"; 6 7 struct { 8 __uint(type, BPF_MAP_TYPE_ARRAY); 9 __uint(max_entries, 1); 10 __type(key, unsigned int); 11 __type(value, unsigned long long); 12 } rtla_test_map SEC(".maps"); 13 14 struct trace_event_raw_timerlat_sample; 15 16 SEC("tp/timerlat_action") 17 int action_handler(struct trace_event_raw_timerlat_sample *tp_args) 18 { 19 unsigned int key = 0; 20 unsigned long long value = 42; 21 22 bpf_map_update_elem(&rtla_test_map, &key, &value, BPF_ANY); 23 24 return 0; 25 } 26