[PATCH] using get/put_user64 apis on 64bit machine

[Bhushan Bharat-R65777]

> -----Original Message-----
> From: Benjamin Herrenschmidt [mailto:benh at kernel.crashing.org]
> Sent: Monday, September 10, 2012 10:12 AM
> To: Bhushan Bharat-R65777
> Cc: linuxppc-dev at lists.ozlabs.org; galak at kernel.crashing.org; agraf at suse.de;
> Wood Scott-B07421; Bhushan Bharat-R65777
> Subject: Re: [PATCH] using get/put_user64 apis on 64bit machine
> 
> On Mon, 2012-07-23 at 15:46 +0530, Bharat Bhushan wrote:
> > On powerpc64 machine get/put_user64() is same as get/put_user() while
> > on powerpc32 machine get_user64 is different. With this patch we can
> > use get_user64() and put_user64() on 32 and 64 bit machines.
> >
> > Signed-off-by: Bharat Bhushan <bharat.bhushan at freescale.com>
> > ---
> 
> There appear to be no user of any of these APIs in the tree. There's also no
> get_user64 -> __get_user64() macros either. Why not just remove the whole lot ?

When I sent the patch I did not search the users, I agree that we can remove the __get_user64 and __put_user64 altogether.

Thanks
-Bharat 

> 
> Cheers,
> Ben.
> 
> >  arch/powerpc/include/asm/uaccess.h |    7 +++++++
> >  1 files changed, 7 insertions(+), 0 deletions(-)
> >
> > diff --git a/arch/powerpc/include/asm/uaccess.h
> > b/arch/powerpc/include/asm/uaccess.h
> > index 17bb40c..01743aa 100644
> > --- a/arch/powerpc/include/asm/uaccess.h
> > +++ b/arch/powerpc/include/asm/uaccess.h
> > @@ -114,10 +114,17 @@ struct exception_table_entry {  #define
> > __put_user(x, ptr) \
> >  	__put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
> >
> > +/*
> > + * On powerpc64 machine get/put_user64() is same as get/put_user()
> > +while
> > + * on powerpc32 machine get_user64 is different.
> > + */
> >  #ifndef __powerpc64__
> >  #define __get_user64(x, ptr) \
> >  	__get_user64_nocheck((x), (ptr), sizeof(*(ptr)))  #define
> > __put_user64(x, ptr) __put_user(x, ptr)
> > +#else
> > +#define __get_user64(x, ptr) __get_user(x, ptr) #define
> > +__put_user64(x, ptr) __put_user(x, ptr)
> >  #endif
> >
> >  #define __get_user_inatomic(x, ptr) \
> 
>