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[Po-Hsu Lin <2034483@xxxxxxxxxxxxxxxxxx>]

Error message on F-hwe-5.15 ARM64

 [stdout]   CLNG-BPF [test_maps] tailcall3.o
 [stdout]   CLNG-BPF [test_maps] freplace_global_func.o
 [stdout]   CLNG-BPF [test_maps] btf__core_reloc_nesting___err_missing_container.o
 [stdout]   CLNG-BPF [test_maps] btf_dump_test_case_packing.o
 [stdout]   CLNG-BPF [test_maps] test_endian.o
 [stderr] In file included from progs/test_endian.c:4:
 [stderr] /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/tools/include/vmlinux.h:5:15: error: attribute 'preserve_access_index' is not supported by '#pragma clang attribute'
 [stderr] #pragma clang attribute push (__attribute__((preserve_access_index)), apply_to = record)
 [stderr]               ^
 [stderr] /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/tools/include/vmlinux.h:160504:15: error: '#pragma clang attribute pop' with no matching '#pragma clang attribute push'
 [stderr] #pragma clang attribute pop
 [stderr]               ^
 [stderr] 2 errors generated.
 [stderr] make[1]: *** [Makefile:470: /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/test_endian.o] Error 1
 [stdout] make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf'
 [stdout] make: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests'
 [stderr] make: *** [Makefile:171: all] Error 2

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https://bugs.launchpad.net/bugs/2034483

Title:
  ubuntu_bpf failed to build with F-hwe-5.15

Status in ubuntu-kernel-tests:
  New

Bug description:
  Issue found with 5.15.0-83.92~20.04.1

  This is not a regression as we didn't test ubuntu_bpf on this kernel
  before.

  Test build failed with:
      CLNG-BPF [test_maps] test_global_func13.o
      CLNG-BPF [test_maps] test_cls_redirect_subprogs.o
      CLNG-BPF [test_maps] test_overhead.o
      CLNG-BPF [test_maps] timer_mim.o
    make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf'
    make: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests'
    stderr:
    Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'
    Warning: Kernel ABI header at 'tools/include/uapi/linux/netlink.h' differs from latest version at 'include/uapi/linux/netlink.h'
    Warning: Kernel ABI header at 'tools/include/uapi/linux/if_link.h' differs from latest version at 'include/uapi/linux/if_link.h'
    In file included from progs/timer_mim.c:7:
    /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/bpf_tcp_helpers.h:24:18: warning: unknown attribute 'preserve_access_index' ignored [-Wunknown-attributes]
    } __attribute__((preserve_access_index));
                     ^
    /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/bpf_tcp_helpers.h:37:18: warning: unknown attribute 'preserve_access_index' ignored [-Wunknown-attributes]
    } __attribute__((preserve_access_index));
                     ^
    /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/bpf_tcp_helpers.h:41:18: warning: unknown attribute 'preserve_access_index' ignored [-Wunknown-attributes]
    } __attribute__((preserve_access_index));
                     ^
    /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/bpf_tcp_helpers.h:52:18: warning: unknown attribute 'preserve_access_index' ignored [-Wunknown-attributes]
    } __attribute__((preserve_access_index));
                     ^
    /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/bpf_tcp_helpers.h:56:18: warning: unknown attribute 'preserve_access_index' ignored [-Wunknown-attributes]
    } __attribute__((preserve_access_index));
                     ^
    /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/bpf_tcp_helpers.h:84:18: warning: unknown attribute 'preserve_access_index' ignored [-Wunknown-attributes]
    } __attribute__((preserve_access_index));
                     ^
    /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/bpf_tcp_helpers.h:133:18: warning: unknown attribute 'preserve_access_index' ignored [-Wunknown-attributes]
    } __attribute__((preserve_access_index));
                     ^
    /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/bpf_tcp_helpers.h:149:18: warning: unknown attribute 'preserve_access_index' ignored [-Wunknown-attributes]
    } __attribute__((preserve_access_index));
                     ^
    /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/bpf_tcp_helpers.h:208:11: error: use of unknown builtin '__builtin_preserve_field_info' [-Wimplicit-function-declaration]
            return !!BPF_CORE_READ_BITFIELD(tp, is_cwnd_limited);
                     ^
    /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/tools/include/bpf/bpf_core_read.h:88:36: note: expanded from macro 'BPF_CORE_READ_BITFIELD'
            const void *p = (const void *)s + __CORE_RELO(s, field, BYTE_OFFSET); \
                                              ^
    /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/tools/include/bpf/bpf_core_read.h:41:2: note: expanded from macro '__CORE_RELO'
            __builtin_preserve_field_info((src)->field, BPF_FIELD_##info)
            ^
    8 warnings and 1 error generated.
    make[1]: *** [Makefile:470: /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/timer_mim.o] Error 1
    make: *** [Makefile:171: all] Error 2

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