[PATCH 2/2] No-exec support for ppc64

[Benjamin Herrenschmidt]

On Wed, 2005-03-09 at 21:25 -0600, Olof Johansson wrote:
> Hi,
> 
> On Tue, Mar 08, 2005 at 05:13:26PM -0600, Jake Moilanen wrote:
> > diff -puN arch/ppc64/mm/hash_utils.c~nx-kernel-ppc64 arch/ppc64/mm/hash_utils.c
> > --- linux-2.6-bk/arch/ppc64/mm/hash_utils.c~nx-kernel-ppc64	2005-03-08 16:08:57 -06:00
> > +++ linux-2.6-bk-moilanen/arch/ppc64/mm/hash_utils.c	2005-03-08 16:08:57 -06:00
> > @@ -89,12 +90,23 @@ static inline void loop_forever(void)
> >  		;
> >  }
> >  
> > +int is_kernel_text(unsigned long addr)
> > +{
> > +	if (addr >= (unsigned long)_stext && addr < (unsigned long)__init_end)
> > +		return 1;
> > +
> > +	return 0;
> > +}
> 
> This is used in two files, but never declared extern in the second file
> (iSeries_setup.c). Should it go in a header file as a static inline
> instead?

Yes, I think it should.

> There also seems to be a local static is_kernel_text() in kallsyms that
> overlaps (but it's not identical). Removing that redundancy can be taken
> care of as a janitorial patch outside of the noexec stuff.
> 
> 
> 
> -Olof
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-- 
Benjamin Herrenschmidt <benh at kernel.crashing.org>