unimore/kernel-hacking-2024-linux-steffo
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bpf: let kprobe programs use bpf_get_smp_processor_id() helper

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It's useful to do per-cpu histograms.

Suggested-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexei Starovoitov 2015-06-12 19:39:14 -07:00 committed by David S. Miller
parent 0756ea3e85
commit ab1973d325
1 changed files with 2 additions and 0 deletions
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2
kernel/trace/bpf_trace.c
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@ -181,6 +181,8 @@ static const struct bpf_func_proto *kprobe_prog_func_proto(enum bpf_func_id func
return &bpf_get_current_comm_proto;
case BPF_FUNC_trace_printk:
return bpf_get_trace_printk_proto();
case BPF_FUNC_get_smp_processor_id:
return &bpf_get_smp_processor_id_proto;
default:
return NULL;
}