Hello,
I would like to define trace events for functions without arguments,
e.g. my_yield(). But TRACE_EVENT requires at least one argument to be
defined and I also have not found an example in the kernel sources,
apart from:
$ cat include/trace/events/xen.h
...
TRACE_EVENT(xen_mmu_flush_tlb,
TP_PROTO(int x),
TP_ARGS(x),
TP_STRUCT__entry(__array(char, x, 0)),
TP_fast_assign((void)x),
TP_printk("%s", "")
);
It uses a dummy argument to work around the problem. Is that the
recommended way to handle such cases?
TIA,
Wolfgang
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