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Date:   Thu, 23 Nov 2017 20:24:47 +0100 (CET)
From:   Thomas Gleixner <>
To:     Andy Lutomirski <>
cc:     X86 ML <>, Borislav Petkov <>,
        "" <>,
        Brian Gerst <>,
        Dave Hansen <>,
        Linus Torvalds <>,
        Josh Poimboeuf <>
Subject: Re: [PATCH v2 05/18] x86/fixmap: Generalize the GDT fixmap

On Tue, 21 Nov 2017, Andy Lutomirski wrote:

> Currently, the GDT is an ad-hoc array of pages, one per CPU, in the
> fixmap.  Generalize it to be an array of a new struct cpu_entry_area
> so that we can cleanly add new things to it.
> Signed-off-by: Andy Lutomirski <>

> +/*
> + * cpu_entry_area is a percpu region in the fixmap that contains things
> + * needed by the CPU and early entry/exit code.  Real types aren't used
> + * for all fields here to about circular header dependencies.

s/to about/to avoid/ ???

Other than that.

Reviewed-by: Thomas Gleixner <>

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