linux-kernel - Re: [PATCH] mm: setup_usemap() must be _

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Message-ID: <20080217194320.GL14588@uranus.ravnborg.org>
Date:	Sun, 17 Feb 2008 20:43:20 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Mel Gorman <mel@....ul.ie>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Development <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm: setup_usemap() must be __meminit

On Sun, Feb 17, 2008 at 01:31:14PM +0100, Geert Uytterhoeven wrote:
> On Sun, 17 Feb 2008, Geert Uytterhoeven wrote:
> > On m68k (CONFIG_SPARSEMEM is not set), I get:
> > 
> >     WARNING: vmlinux.o(.meminit.text+0x36c): Section mismatch in reference from the function free_area_init_core() to the function .init.text:setup_usemap()
> >     The function __meminit free_area_init_core() references
> >     a function __init setup_usemap().
> >     If free_area_init_core is only used by setup_usemap then
> >     annotate free_area_init_core with a matching annotation.
> > 
> > If CONFIG_SPARSEMEM is set, the problem is  not noticed because setup_usemap()
> > is always inlined.
> > 
> > Properly annotating setup_usemap() and usemap_size() fixes it.
> 
> Woops, hit the send button too soon.
> 
> setup_usemap() calls alloc_bootmem_node(), causing a whole new
> avalanche of warnings to be fixed up :-(

Something you like me to help with?
I would need a config where the mismatch triggers for one
of the more popular architectures (as in where I have a toolchain).

I could not reproduce it with x86 64bit - not even with -fno-inline-functions

	Sam
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