Re: [PATCH 1/2] kbuild: Add "Section mismatch" warning whitelist for powerpc

[Kumar Gala <galak@kernel.crashing.org>]

On May 14, 2007, at 6:06 AM, Sam Ravnborg wrote:

> On Mon, May 14, 2007 at 06:53:32PM +0800, Li Yang wrote:
> > This patch fixes the following "Section mismatch" warnings when
> > build powerpc platforms.
> >
> > -------------
> > WARNING: arch/powerpc/mm/built-in.o - Section mismatch: reference to
> > .init.text:early_get_page from .text between  
> > 'pte_alloc_one_kernel' (at
> > offset 0xc68) and 'pte_alloc_one'
> > WARNING: mm/built-in.o - Section mismatch: reference to
> > .init.text:set_up_list3s from .text between  
> > 'kmem_cache_create' (at offset
> > 0x20300) and 'cache_reap'
> > -------------
This warnings should be handled by __init_refok instead.

- k

> > Massive warnings represented by:
> > -------------
> > WARNING: arch/powerpc/kernel/built-in.o - Section mismatch:  
> > reference to
> > .init.data:.got2 from prom_entry (offset 0x0)
> > WARNING: arch/powerpc/platforms/built-in.o - Section mismatch:  
> > reference to
> > .init.text:mpc8313_rdb_probe from .machine.desc after  
> > 'mach_mpc8313_rdb'
> > (at offset 0x4)
> > -------------
> >
> > Signed-off-by: Li Yang <leoli@freescale.com>
> Acked-by: Sam Ravnborg <sam@ravnborg.org>
> > ---
> > scripts/mod/modpost.c |   16 ++++++++++++----
> > 1 files changed, 12 insertions(+), 4 deletions(-)
> >
> > diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
> > index c89cb71..aa3a881 100644
> > --- a/scripts/mod/modpost.c
> > +++ b/scripts/mod/modpost.c
> > @@ -649,9 +649,10 @@ static int strrcmp(const char *s, const char  
> > *sub)
> >  *  tosec    = .init.text
> >  *
> >  * Pattern 10:
> > - *  ia64 has machvec table for each platform. It is mixture of  
> > function
> > - *  pointer of .init.text and .text.
> > - *  fromsec  = .machvec
> > + *  ia64 has machvec table and powerpc has machine desc table for  
> > each
> > + *  platform. It is mixture of function pointer of .init.text  
> > and .text.
> > + *  fromsec  = .machvec | .machine.desc
> > + *
> >  **/
> > static int secref_whitelist(const char *modname, const char *tosec,
> > 			    const char *fromsec, const char *atsym,
> > @@ -681,6 +682,8 @@ static int secref_whitelist(const char  
> > *modname, const
> > char *tosec,
> > 	const char *pat4sym[] = {
> > 		"sparse_index_alloc",
> > 		"zone_wait_table_init",
> > +		"pte_alloc_one_kernel",
> > +		"kmem_cache_create",
> > 		NULL
> > 	};
> >
> > @@ -750,7 +753,8 @@ static int secref_whitelist(const char  
> > *modname, const
> > char *tosec,
> > 				return 1;
> >
> > 	/* Check for pattern 10 */
> > -	if (strcmp(fromsec, ".machvec") == 0)
> > +	if ((strcmp(fromsec, ".machvec") == 0) ||
> > +	    (strcmp(fromsec, ".machine.desc") == 0))
> > 		return 1;
> >
> > 	return 0;
> > @@ -883,6 +887,10 @@ static void warn_sec_mismatch(const char  
> > *modname,
> > const char *fromsec,
> > 	    secref_whitelist(modname, secname, fromsec,
> > 			     elf->strtab + before->st_name, refsymname))
> > 		return;
> > +	/* fromsec whitelist - without a valid 'before' */
> > +	/* powerpc has a GOT table in .got2 section */
> > +	if (strcmp(fromsec, ".got2") == 0)
> > +		return;
> >
> > 	if (before && after) {
> > 		warn("%s - Section mismatch: reference to %s:%s from %s "
> -
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