-support-for-the-user-space-interface/20230915-230157
> base: linus/master
> patch link:
> https://lore.kernel.org/r/b619d9fd08a3bb47018cf40afa95783844a3c1fd.1694789910.git.bristot%40kernel.org
> patch subject: [PATCH] tracing/timerlat: Hotplug support for the user-space
> interface
rnel.org/r/b619d9fd08a3bb47018cf40afa95783844a3c1fd.1694789910.git.bristot%40kernel.org
patch subject: [PATCH] tracing/timerlat: Hotplug support for the user-space
interface
config: um-randconfig-002-20230916
(https://download.01.org/0day-ci/archive/20230916/202309160854.saw0rium-...@intel.
The osnoise/per_cpu/CPU$/timerlat_fd is create for each possible
CPU, but it might create confusion if the CPU is not online.
Create the file only for online CPUs, also follow hotplug by
creating and deleting as CPUs come and go.
Fixes: e88ed227f639 ("tracing/timerlat: Add user-space interface")
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