Re: [PATCH 2.6.12-rc1-mm1 3/3] perfctr: 64-bit values in register descriptors

[David Gibson]

On Wed, Mar 23, 2005 at 04:00:03AM +0100, Mikael Pettersson wrote:
> - <linux/perfctr.h>: Change value fields in register descriptors
>   to 64 bits. This will be needed for ppc64, and ppc32 user-space
>   on ppc64 kernels, and may eventually also be needed on x86.
>   We could have different descriptor types for 32 and 64-bit
>   registers, but that just complicates things for no real benefit.
> 
> Signed-off-by: Mikael Pettersson <mikpe@xxxxxxxxx>

Erm.. won't this stop i386 binaries working on an x86_64 kernel, since
kernel and user will have different ideas of the alignment...?

>  include/linux/perfctr.h |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff -rupN linux-2.6.12-rc1-mm1/include/linux/perfctr.h linux-2.6.12-rc1-mm1.perfctr-update-common/include/linux/perfctr.h
> +++ linux-2.6.12-rc1-mm1.perfctr-update-common/include/linux/perfctr.h	2005-03-23 02:19:45.000000000 +0100
> @@ -27,10 +27,10 @@ struct vperfctr_control {
>  #define VPERFCTR_CONTROL_RESUME		0x03
>  #define VPERFCTR_CONTROL_CLEAR		0x04
>  
> -/* common description of an arch-specific 32-bit control register */
> +/* common description of an arch-specific control register */
>  struct perfctr_cpu_reg {
>  	__u32 nr;
> -	__u32 value;
> +	__u64 value;
>  };
>  
>  /* state and control domain numbers

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/people/dgibson
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