linux-kernel - Re: [PATCH 1/2 v2] of: move phandle/ihandle into types.h and export to userspace

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Date:	Fri, 8 Oct 2010 11:12:10 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Andres Salomon <dilinger@...ued.net>
Cc:	sparclinux@...r.kernel.org, davem@...emloft.net,
	linux-kernel@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>,
	devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH 1/2 v2] of: move phandle/ihandle into types.h and
 export to userspace

On Fri, Oct 08, 2010 at 12:43:54AM -0700, Andres Salomon wrote:
> 
> We need phandle for some exported sparc headers; of.h isn't an
> exported header, and it would be silly to export it when all we
> really need is one or two types from it.  Also, later patches
> use phandle in structs that are exported to userspace, so export
> a __kernel_phandle type.
> 
> Signed-off-by: Andres Salomon <dilinger@...ued.net>

Looks okay to me.  I'm build testing it now on powerpc and
microblaze.  If davem agrees, then I'll pick it up into my
devicetree-next branch.

Question though; since sparc userspace is the only user of this,
should the types.h header avoid exposing it on non-sparc?

g.

> ---
>  include/linux/of.h    |    3 ---
>  include/linux/types.h |    7 +++++++
>  2 files changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/include/linux/of.h b/include/linux/of.h
> index cad7cf0..db184dc 100644
> --- a/include/linux/of.h
> +++ b/include/linux/of.h
> @@ -25,9 +25,6 @@
>  
>  #ifdef CONFIG_OF
>  
> -typedef u32 phandle;
> -typedef u32 ihandle;
> -
>  struct property {
>  	char	*name;
>  	int	length;
> diff --git a/include/linux/types.h b/include/linux/types.h
> index 01a082f..67a034a 100644
> --- a/include/linux/types.h
> +++ b/include/linux/types.h
> @@ -178,10 +178,17 @@ typedef __u64 __bitwise __be64;
>  typedef __u16 __bitwise __sum16;
>  typedef __u32 __bitwise __wsum;
>  
> +/* Basic openboot/openfirmware types */
> +typedef __u32 __kernel_phandle;
> +typedef __u32 __kernel_ihandle;
> +
>  #ifdef __KERNEL__
>  typedef unsigned __bitwise__ gfp_t;
>  typedef unsigned __bitwise__ fmode_t;
>  
> +typedef __kernel_phandle phandle;
> +typedef __kernel_ihandle ihandle;
> +
>  #ifdef CONFIG_PHYS_ADDR_T_64BIT
>  typedef u64 phys_addr_t;
>  #else
> -- 
> 1.5.6.5
> 
--
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