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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2021-08-04 14:18:48 -0400
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2021-08-05 09:27:31 -0400
commit51397dc6f283bb570e1cf8226017d300d8ea1f5b (patch)
tree985cc8bdddf6ad3a03b3d73b8e9c992d5a17f7cf /Makefile
parent1c0cec64a7cc545eb49f374a43e9f7190a14defa (diff)
tracing: Quiet smp_processor_id() use in preemptable warning in hwlat
The hardware latency detector (hwlat) has a mode that it runs one thread across CPUs. The logic to move from the currently running CPU to the next one in the list does a smp_processor_id() to find where it currently is. Unfortunately, it's done with preemption enabled, and this triggers a warning for using smp_processor_id() in a preempt enabled section. As it is only using smp_processor_id() to get information on where it currently is in order to simply move it to the next CPU, it doesn't really care if it got moved in the mean time. It will simply balance out later if such a case arises. Switch smp_processor_id() to raw_smp_processor_id() to quiet that warning. Link: https://lkml.kernel.org/r/20210804141848.79edadc0@oasis.local.home Acked-by: Daniel Bristot de Oliveira <bristot@redhat.com> Fixes: 8fa826b7344d ("trace/hwlat: Implement the mode config option") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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