linux-kernel - Re: [tip:x86/urgent] x86: Fix false positive section mismatch warnings in the apic code

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Date:	Sun, 19 Apr 2009 15:56:39 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Marcin Slusarz <marcin.slusarz@...il.com>
Cc:	Sam Ravnborg <sam@...nborg.org>, mingo@...hat.com, hpa@...or.com,
	linux-kernel@...r.kernel.org, rakib.mullick@...il.com,
	akpm@...ux-foundation.org, tglx@...utronix.de,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/urgent] x86: Fix false positive section mismatch
	warnings in the apic code


* Marcin Slusarz <marcin.slusarz@...il.com> wrote:

> Ingo Molnar wrote:
> > * Marcin Slusarz <marcin.slusarz@...il.com> wrote:
> > 
> >> tip-bot for Rakib Mullick pisze:
> >>> Commit-ID:  aa57a15ad17d284e62fbd24cf7e0eb628b2cb3f7
> >>> Gitweb:     http://git.kernel.org/tip/aa57a15ad17d284e62fbd24cf7e0eb628b2cb3f7
> >>> Author:     Rakib Mullick <rakib.mullick@...il.com>
> >>> AuthorDate: Sun, 19 Apr 2009 08:41:17 +0600
> >>> Committer:  Ingo Molnar <mingo@...e.hu>
> >>> CommitDate: Sun, 19 Apr 2009 11:28:18 +0200
> >>>
> >>> x86: Fix false positive section mismatch warnings in the apic code
> >>>
> >>> find_unisys_acpi_oem_table() and unmap_unisys_acpi_oem_table() 
> >>> are non init functions, but these functions calls some init 
> >>> functions. But we need these functions as non-init functions.
> >> Why? This warning seems to be valid.
> > 
> > It's put into struct apic::acpi_madt_oem_check - which is a 
> > non-init structure. That particular field is only used from init 
> > context - but other fields are used all the time.
> 
> Can we have a rule that "every __ref usage should have a comment 
> explaining why __ref is safe in this place"?

Yes, that's prudent.

	Ingo
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