Re: [PATCH bpf-next v7 0/5] bpf: Add open-coded style process file iterator and bpf_fget_task() kfunc

[Juntong Deng <juntong.deng@xxxxxxxxxxx>]

I noticed that the errors in Kernel CI

progs/iters_task_file.c: In function ‘test_bpf_iter_task_file’:
  progs/iters_task_file.c:43:33: error: taking address of expression of 
type ‘void’ [-Werror]
     43 |         if (item->file->f_op != &pipefifo_fops) {
        |                                 ^
  progs/iters_task_file.c:59:33: error: taking address of expression of 
type ‘void’ [-Werror]
     59 |         if (item->file->f_op != &pipefifo_fops) {
        |                                 ^
  progs/iters_task_file.c:75:33: error: taking address of expression of 
type ‘void’ [-Werror]
     75 |         if (item->file->f_op != &socket_file_ops) {
        |                                 ^

These errors are caused by -Werror (treat all warnings as errors).

In this test case, we do need to get the address of void type.