Merge tag 'pr-move-task-cpu-to-ti' of git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git

Cross-architecture update to move task_struct::cpu back into thread_info
on arm64, x86, s390, powerpc, and riscv. All Acked by arch maintainers.

Quoting Ard Biesheuvel:

 "Move task_struct::cpu back into thread_info

  Keeping CPU in task_struct is problematic for architectures that define
  raw_smp_processor_id() in terms of this field, as it requires
  linux/sched.h to be included, which causes a lot of pain in terms of
  circular dependencies (aka 'header soup')

  This series moves it back into thread_info (where it came from) for all
  architectures that enable THREAD_INFO_IN_TASK, addressing the header
  soup issue as well as some pointless differences in the implementations
  of task_cpu() and set_task_cpu()."

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