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    SubjectRe: [PATCH v5 8/8] LoongArch: Add ORC stack unwinder support
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    On 12/03/2023 08:42 PM, Huacai Chen wrote:
    > On Wed, Nov 29, 2023 at 9:07 PM Tiezhu Yang <yangtiezhu@loongson.cn> wrote:
    >>
    >> The kernel CONFIG_UNWINDER_ORC option enables the ORC unwinder, which is
    >> similar in concept to a DWARF unwinder. The difference is that the format
    >> of the ORC data is much simpler than DWARF, which in turn allows the ORC
    >> unwinder to be much simpler and faster.

    ...

    >> diff --git a/arch/loongarch/lib/Makefile b/arch/loongarch/lib/Makefile
    >> index a77bf160bfc4..e3023d9a508c 100644
    >> --- a/arch/loongarch/lib/Makefile
    >> +++ b/arch/loongarch/lib/Makefile
    >> @@ -3,6 +3,8 @@
    >> # Makefile for LoongArch-specific library files.
    >> #
    >>
    >> +OBJECT_FILES_NON_STANDARD := y
    >> +
    >> lib-y += delay.o memset.o memcpy.o memmove.o \
    >> clear_user.o copy_user.o csum.o dump_tlb.o unaligned.o
    >>
    > I have a draft live-patch patch here:
    > https://github.com/chenhuacai/linux/commit/744942cbf456b320f2333638e4bd27d35900284c
    >
    > But we get such an error:
    >
    > # selftests: livepatch: test-ftrace.sh
    >
    > [48/1865]
    > [14936.262721] livepatch: failed to register ftrace handler for
    > function 'cmdline_proc_show' (-16)
    > # TEST: livepatch interaction with ftrace_enabled sysctl ...

    ...

    > I think it is probably because we skip mem* functions here.

    I did not test livepatch which is a separate new feature,
    let me try it, maybe it needs some time because I am very
    busy with some other stuffs.

    Thanks,
    Tiezhu

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