On Wed, 2014-06-18 at 11:39 +0100, Catalin Marinas wrote:
> On Tue, Jun 17, 2014 at 06:14:26PM +0100, Mark Salter wrote:
> > The __cpu_clear_user_page() and __cpu_copy_user_page() functions
> > are not currently exported. This prevents modules from using
> > clear_user_page() and opy_user_page().
> >
> > Signed-off-by: Mark Salter <msal...@redhat.com>
> > ---
> > arch/arm64/mm/copypage.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/arch/arm64/mm/copypage.c b/arch/arm64/mm/copypage.c
> > index 9aecbac..13bbc3be 100644
> > --- a/arch/arm64/mm/copypage.c
> > +++ b/arch/arm64/mm/copypage.c
> > @@ -27,8 +27,10 @@ void __cpu_copy_user_page(void *kto, const void *kfrom,
> > unsigned long vaddr)
> > copy_page(kto, kfrom);
> > __flush_dcache_area(kto, PAGE_SIZE);
> > }
> > +EXPORT_SYMBOL_GPL(__cpu_copy_user_page);
> >
> > void __cpu_clear_user_page(void *kaddr, unsigned long vaddr)
> > {
> > clear_page(kaddr);
> > }
> > +EXPORT_SYMBOL_GPL(__cpu_clear_user_page);
>
> I wonder why we still have these functions. I don't think we need any
> D-cache flushing for copy_user_page(), so we could simply remove this
> code and define copy_user_page() as copy_page() (similarly for
> clear_user_page). I'll post a patch separately removing the copy_page,
> copy_user_page etc. functions (now that we also have optimised memcpy
> and memset).
>
Even better. I much prefer removing code than adding it. Thanks.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
