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    Subject[PATCH 0/3] kallsyms: Optimize the search for module symbols by livepatch and bpf
    Date
    Patches 7-8 in [1] have been delayed until now due to merge conflicts. The
    current patch 1/3 corresponds to patch 7/9 in [1], and the current patch 3/3
    corresponds to patch 8/9 in [1]. But there are some changes. Originally, only
    livepatch uses function module_kallsyms_on_each_symbol(), it find the specified
    function for the specified module. Now, bpf also uses function
    module_kallsyms_on_each_symbol(), it needs to traverse all the modules. So for
    the new parameter 'modname' of module_kallsyms_on_each_symbol(), if it's NULL,
    the symbols of all modules are still traversed for compatibility with the case
    of bpf.

    Patch 2/3 is new, as I understand it, it should be fine. If it doesn't work,
    then patch 3/3 should be dropped.

    [1] https://lkml.org/lkml/2022/11/2/225

    Zhen Lei (3):
    livepatch: Improve the search performance of
    module_kallsyms_on_each_symbol()
    bpf: Optimize get_modules_for_addrs()
    kallsyms: Delete an unused parameter related to
    {module_}kallsyms_on_each_symbol()

    include/linux/kallsyms.h | 3 +-
    include/linux/module.h | 8 +--
    kernel/kallsyms.c | 5 +-
    kernel/kallsyms_selftest.c | 6 +--
    kernel/livepatch/core.c | 13 +----
    kernel/module/kallsyms.c | 16 ++++--
    kernel/trace/bpf_trace.c | 101 +++++++++++++++----------------------
    kernel/trace/ftrace.c | 5 +-
    8 files changed, 67 insertions(+), 90 deletions(-)

    --
    2.25.1

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