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cc     exploit.c   -o exploit
exploit.c: In function ‘hppa_br_setup’:
exploit.c:81:12: error: ‘struct io_uring_buf_reg’ has no member named ‘flags’
   81 |         reg.flags = IOU_PBUF_RING_MMAP;
      |            ^
exploit.c:81:21: error: ‘IOU_PBUF_RING_MMAP’ undeclared (first use in this function)
   81 |         reg.flags = IOU_PBUF_RING_MMAP;
      |                     ^~~~~~~~~~~~~~~~~~
exploit.c:81:21: note: each undeclared identifier is reported only once for each function it appears in
exploit.c:90:15: error: ‘IORING_OFF_PBUF_RING’ undeclared (first use in this function); did you mean ‘IORING_OFF_CQ_RING’?
   90 |         off = IORING_OFF_PBUF_RING | (unsigned long long) bgid << IORING_OFF_PBUF_SHIFT;
      |               ^~~~~~~~~~~~~~~~~~~~
      |               IORING_OFF_CQ_RING
exploit.c:90:67: error: ‘IORING_OFF_PBUF_SHIFT’ undeclared (first use in this function); did you mean ‘IORING_CQE_BUFFER_SHIFT’?
   90 |         off = IORING_OFF_PBUF_RING | (unsigned long long) bgid << IORING_OFF_PBUF_SHIFT;
      |                                                                   ^~~~~~~~~~~~~~~~~~~~~
      |                                                                   IORING_CQE_BUFFER_SHIFT