On Wed, Mar 07, 2007 at 11:47:40PM +0100, Pavel Machek wrote:
> Hi!
>
> > o __pa() should be used only on kernel linearly mapped virtual addresses
> > and not on kernel text and data addresses.
> >
> > o Hibernation code needs to determine the physical address associated
> > with kernel symbol to mark a section boundary which contains pages which
> > don't have to be saved and restored during hibernate/resume operation.
> >
> > o Move this piece of code in arch dependent section. So that architectures
> > which don't have kernel text/data mapped into kernel linearly mapped
> > region can come up with their own ways of determining physical addresses
> > associated with a kernel text.
> >
> > Signed-off-by: Vivek Goyal <[EMAIL PROTECTED]>
>
> ...hmm, but that means 3 copies of same code. Can we put the
>
Actually it is not exactly same code. i386 and x86_64 use __pa_symbol()
and powerpc uses __pa() for determining physical address associated with
a kernel text symbol. That's the precise intent here. Leave it to arch
code to decide how to calculate physical address associated with a kernel
symbol.
> > +/*
> > + * pfn_is_nosave - check if given pfn is in the 'nosave' section
> > + */
> > +
> > +int pfn_is_nosave(unsigned long pfn)
> > +{
> > + unsigned long nosave_begin_pfn = __pa_symbol(&__nosave_begin) >>
> > PAGE_SHIFT;
> > + unsigned long nosave_end_pfn = PAGE_ALIGN(__pa_symbol(&__nosave_end))
> > >> PAGE_SHIFT;
> > + return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
> > +}
>
> ...in asm-generic/suspend.h (or something) and then just include it?
> Pavel
As code is not exactly same, we can't put it in asm-generic/suspend.h.
Thanks
Vivek
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