[RFC PATCH 5/8] sched: move CPU field back into thread_info if THREAD_INFO_IN_TASK=y

[Catalin Marinas]

On Tue, Sep 14, 2021 at 02:10:33PM +0200, Ard Biesheuvel wrote:
> THREAD_INFO_IN_TASK moved the CPU field out of thread_info, but this
> causes some issues on architectures that define raw_smp_processor_id()
> in terms of this field, due to the fact that #include'ing linux/sched.h
> to get at struct task_struct is problematic in terms of circular
> dependencies.
> 
> Given that thread_info and task_struct are the same data structure
> anyway when THREAD_INFO_IN_TASK=y, let's move it back so that having
> access to the type definition of struct thread_info is sufficient to
> reference the CPU number of the current task.
> 
> Signed-off-by: Ard Biesheuvel <ardb at kernel.org>

Acked-by: Catalin Marinas <catalin.marinas at arm.com>