Re: [PATCH 2/5] Add nsecs_to_cputime64 interface for asm-generic-v2

[Martin Schwidefsky]

On Tue, 21 Dec 2010 17:09:01 -0800
Venkatesh Pallipadi <venki@xxxxxxxxxx> wrote:

> Add nsecs_to_cputime64 interface. This is used in following patches that
> updates cpu irq stat based on ns granularity info in IRQ_TIME_ACCOUNTING.
> 
> Tested-by: Shaun Ruffell <sruffell@xxxxxxxxxx>
> Signed-off-by: Venkatesh Pallipadi <venki@xxxxxxxxxx>
> ---
>  include/asm-generic/cputime.h |    3 +++
>  include/linux/jiffies.h       |    1 +
>  kernel/time.c                 |   23 +++++++++++++++++++++--
>  3 files changed, 25 insertions(+), 2 deletions(-)
> 
> diff --git a/include/asm-generic/cputime.h b/include/asm-generic/cputime.h
> index 2bcc5c7..61e03dd 100644
> --- a/include/asm-generic/cputime.h
> +++ b/include/asm-generic/cputime.h
> @@ -30,6 +30,9 @@ typedef u64 cputime64_t;
>  #define cputime64_to_jiffies64(__ct)	(__ct)
>  #define jiffies64_to_cputime64(__jif)	(__jif)
>  #define cputime_to_cputime64(__ct)	((u64) __ct)
> +#define cputime64_gt(__a, __b)		((__a) >  (__b))
> +
> +#define nsecs_to_cputime64(__ct)	nsecs_to_jiffies64(__ct)
> 
> 
>  /*

If you define a new cputime primitive it is not enough to add it to the
generic cputime header. You have to add it to the arch-specific cputime
header for ia64, powerpc and s390 as well. Otherwise the build will
break with CONFIG_VIRT_CPU_ACCOUNTING=y on these architectures once the
new primitive is used.

-- 
blue skies,
   Martin.

"Reality continues to ruin my life." - Calvin.

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