linux-kernel - Re: [PATCH 1/2] Undo the split of setup_cpu_entry

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Message-ID: <alpine.DEB.2.20.1712021131210.2199@nanos>
Date:   Sat, 2 Dec 2017 11:34:12 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Andy Lutomirski <luto@...nel.org>
cc:     X86 ML <x86@...nel.org>, Borislav Petkov <bpetkov@...e.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Brian Gerst <brgerst@...il.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH 1/2] Undo the split of setup_cpu_entry_area

On Fri, 1 Dec 2017, Andy Lutomirski wrote:

> This is obviously a hack.  Either the patch should be adjusted back to
> the version I sent or trap_init should forcibly initialize all PMDs
> by something like __set_fixmap(..., __mkpte(0)); or however it's spelled.

I split it because the whole thing crashed when I kept the loop you had
because it tried to allocate stuff. Had no time to figure out why, so I
went the lazy way of making it "work".

Simplifying the whole mess was on my list anyway.

Thanks,

	tglx