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As far as I can tell, PIDTYPE_PID is a kernel-internal name, and
PR_SCHED_CORE_SCOPE_THREAD is the UAPI name. There's no PIDTYPE_PID
in the UAPI headers, and the core scheduling documentation says that
the fourth prctl argument should be a "PR_SCHED_CORE_SCOPE_-prefixed
macro constant".
Link: https://www.kernel.org/doc/html/v6.19/admin-guide/hw-vuln/core-scheduling.html#usage
Fixes: 3f800d2bb ("vmm: Add core scheduling support for vCPU threads")
Signed-off-by: Alyssa Ross <hi@alyssa.is>