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
