These macros are convenient wrappers around the bpf_seq_printf and
bpf_snprintf helpers. They are currently provided by bpf_tracing.h which
targets low level tracing primitives. bpf_helpers.h is a better fit.
The __bpf_narg and __bpf_apply macros are needed in both files so
provided twice and guarded by ifndefs.
Reported-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
Signed-off-by: Florent Revest <revest@xxxxxxxxxxxx>