[U-Boot] [PATCH 3/5] Data type defined for pointer addresses

[Tom Rini]

On Mon, Dec 07, 2015 at 08:50:28AM -0800, York Sun wrote:
> Guys,
> 
> Please comment on this new typedef. I am not comfortable to accept it.
> 
> On 11/18/2015 09:41 PM, Aneesh Bansal wrote:
> > A new data type uintptr_t has been defined for creating
> > pointers (32 or 64 bit depending on Core) from 32 bit variables
> > storing the address.
> > If a 32 bit variable (u32) is typecasted to a pointer (void *),
> > compiler gives a warning in case size of pointer on the core is 64 bit.
> > 
> > Signed-off-by: Aneesh Bansal <aneesh.bansal at freescale.com>
> > ---
> >  arch/arm/include/asm/types.h     | 2 ++
> >  arch/powerpc/include/asm/types.h | 1 +
> >  2 files changed, 3 insertions(+)
> > 
> > diff --git a/arch/arm/include/asm/types.h b/arch/arm/include/asm/types.h
> > index 388058e..5555765 100644
> > --- a/arch/arm/include/asm/types.h
> > +++ b/arch/arm/include/asm/types.h
> > @@ -56,6 +56,8 @@ typedef unsigned long phys_addr_t;
> >  typedef unsigned long phys_size_t;
> >  #endif
> >  
> > +typedef unsigned long uintptr_t;
> 
> It is used in next patch of this series
> http://patchwork.ozlabs.org/patch/552669/, in two-step casting such as
> 
> (u8 *)(uintptr_t)csf_hdr_addr
> 
> As OP indicated, the variable is u32. Casting to a pointer causes compiling
> warning. Is this the right approach?

Approach is OK.  But please do it as a "backport" of 142956af from the
linux kernel which adds 142956af to <linux/types.h> so everyone has it.

-- 
Tom
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