2016-04-20 Joe Perches <j...@perches.com>:
> On Wed, 2016-04-20 at 16:18 -0300, Gustavo Padovan wrote:
> > From: Gustavo Padovan <gustavo.pado...@collabora.co.uk>
> >
> > This function had copies in 3 different files. Unify them in kernel.h.
> []
> > diff --git a/include/linux/kernel.h b/include/linux/kernel.h
> []
> > @@ -53,6 +53,12 @@
> >
> > #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) +
> > __must_be_array(arr))
> >
> > +static inline void __user *u64_to_user_ptr(u64 address)
> > +{
> > + typecheck(u64, address);
> > + return (void __user *)(uintptr_t)address;
> > +}
> > +
>
> This won't work because by the time address is checked
> address is already u64
>
> This would need to be something like
>
> #define u64_to_user_ptr(x) \
> ({ \
> typecheck(u64, x); \
> u64_to_user_ptr(x); \
> })
Indeed, thanks for noting and for the suggestion.
Gustavo
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