On Wed, Aug 28, 2013 at 05:04:27PM -0600, David Ahern wrote: > On 8/28/13 4:53 PM, Chris Freehill wrote: > >>I am trying to get my linux kernel module that extends perf support to work > >>in a later kernel version. The lkm had been working in 3.0.51. > >> > >>In the new target kernel to which I am trying to port, 3.8.13, I get > >>warnings at the modpost stage complaining about symbols that can no longer > >>be found. If I attempt to load that module, I get errors saying the same > >>thing (those symbols can't be found). > >> > >>The symbols that can't be found are > >> > >>".perf_pmu_enable" > >> > >>".perf_event_update_userpage" > >> > >>".perf_pmu_disable" > >> > >>".perf_event_overflow" > >> > >>".perf_pmu_unregister" > >> > >>".perf_pmu_register" > >> > >>Does anyone have any tips or advice as to how code that calls these > >>previously working functions should now be handled when built against later > >>kernels?
# git show v3.0:kernel/events/core.c | grep EXPORT_SYMBOL EXPORT_SYMBOL_GPL(perf_event_release_kernel); EXPORT_SYMBOL_GPL(perf_event_read_value); EXPORT_SYMBOL_GPL(perf_register_guest_info_callbacks); EXPORT_SYMBOL_GPL(perf_unregister_guest_info_callbacks); EXPORT_SYMBOL_GPL(perf_swevent_get_recursion_context); EXPORT_SYMBOL_GPL(perf_tp_event); EXPORT_SYMBOL_GPL(perf_event_create_kernel_counter); IOW. how can your module have ever used those functions in 3.0 ? Typically the answer to 'why did the export get removed' is simply 'because there are no users'. -- To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
