linux-kernel - Re: [PATCHv6 15/30] x86/boot: Port I/O: allow to hook up alternative helpers

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Date:   Fri, 18 Mar 2022 15:20:31 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     mingo@...hat.com, bp@...en8.de, dave.hansen@...el.com,
        luto@...nel.org, peterz@...radead.org,
        sathyanarayanan.kuppuswamy@...ux.intel.com, aarcange@...hat.com,
        ak@...ux.intel.com, dan.j.williams@...el.com, david@...hat.com,
        hpa@...or.com, jgross@...e.com, jmattson@...gle.com,
        joro@...tes.org, jpoimboe@...hat.com, knsathya@...nel.org,
        pbonzini@...hat.com, sdeep@...are.com, seanjc@...gle.com,
        tony.luck@...el.com, vkuznets@...hat.com, wanpengli@...cent.com,
        thomas.lendacky@....com, brijesh.singh@....com, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCHv6 15/30] x86/boot: Port I/O: allow to hook up
 alternative helpers

On Thu, Mar 17 2022 at 23:10, Kirill A. Shutemov wrote:
> On Thu, Mar 17, 2022 at 01:12:59PM +0100, Thomas Gleixner wrote:
>> #define DEFINE_PORT_IO_OPS()		\
>> 	struct port_io_ops pio_ops = {	\
>>         	.inb	= __inb,	\
>>         	.outb	= __outb,	\
>>         	.outw	= __outw, }
>> 
>> Hmm?
>
> This kind of initializations are problematic. They generate run-time
> relacations that kernel cannot handle in the boot stub. Linker complains
> about this:
>
> 	ld.lld: error: Unexpected run-time relocations (.rela) detected!
>
> I will leave it as is, unless you have better ideas.

Bah, did not think about that.

Thanks,

        tglx