Fix bpf_pseudo_fd() type conversion error
Fix bpf_pseudo_fd() type conversion error

With llvm15 and llvm16, the following command line
  sudo ./trace.py 'smp_call_function_single "%K", arg1'
will cause error:
  /virtual/main.c:60:36: error: incompatible integer to pointer conversion passing 'u64'
    (aka 'unsigned long long') to parameter of type 'void *' [-Wint-conversion]
        bpf_perf_event_output(ctx, bpf_pseudo_fd(1, -1), CUR_CPU_IDENTIFIER, &__data, sizeof(__data));
                                   ^~~~~~~~~~~~~~~~~~~~
  1 error generated.
  Failed to compile BPF module <text>

In helpers.h, we have
  u64 bpf_pseudo_fd(u64, u64) asm("llvm.bpf.pseudo");
Apparently, <= llvm14 can tolerate u64 -> 'void *' conversion, but
llvm15 by default will cause an error.

Let us explicitly convert bpf_pseudo_fd to 'void *' to avoid
such errors.

Signed-off-by: Yonghong Song <e76892bbe783db2f627de1232e139db4de43da60@fb.com>

iovisor/bcc,iovisor/bcc,iovisor/bcc,iovisor/bcc,iovisor/bcc