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0dc4a75150
* Use array_index_nospec() to sanitize the target vCPU ID when handling PV IPIs and yields as the ID is guest-controlled. * Drop a superfluous cpumask_empty() check when reclaiming SEV memory, as the common case, by far, is that at least one CPU will have entered the VM, and wbnoinvd_on_cpus_mask() will naturally handle the rare case where the set of have_run_cpus is empty. * Rename the is_signed_type() macro in kselftest_harness.h to is_signed_var() to fix a collision with linux/overflow.h. The collision generates compiler warnings due to the two macros having different implementations.