linux-kernel - Re: [PATCH 2/5] x86/boot/compressed/64: Find a place for 32-bit trampoline

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Date:   Mon, 26 Feb 2018 23:30:38 +0100
From:   Borislav Petkov <bp@...e.de>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirski <luto@...capital.net>,
        Cyrill Gorcunov <gorcunov@...nvz.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Matthew Wilcox <willy@...radead.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] x86/boot/compressed/64: Find a place for 32-bit
 trampoline

On Mon, Feb 26, 2018 at 09:04:48PM +0300, Kirill A. Shutemov wrote:
> +++ b/arch/x86/boot/compressed/pgtable.h
> @@ -0,0 +1,11 @@
> +#ifndef BOOT_COMPRESSED_PAGETABLE_H
> +#define BOOT_COMPRESSED_PAGETABLE_H
> +
> +#define TRAMPOLINE_32BIT_SIZE		(2 * PAGE_SIZE)
> +
> +#ifndef __ASSEMBLER__

x86 uses __ASSEMBLY__ everywhere and I see

arch/x86/boot/compressed/Makefile:41:KBUILD_AFLAGS  := $(KBUILD_CFLAGS) -D__ASSEMBLY__

so it should work here too.

Even though __ASSEMBLER__ is gcc predefined.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--