Re: [PATCH v5 02/12] MIPS: use generic atomic64 in non-64bit kernels

[David Daney <david.s.daney@gmail.com>]

On 05/27/2010 06:03 AM, Deng-Cheng Zhu wrote:
> 64bit kernel has already had its atomic64 functions. Except for that, we
> use the generic spinlocked version. The atomic64 types and related
> functions are needed for the Linux performance counter subsystem.
>
> Signed-off-by: Deng-Cheng Zhu<dengcheng.zhu@gmail.com>

Acked-by: David Daney <ddaney@caviumnetworks.com>

> ---
>   arch/mips/Kconfig              |    1 +
>   arch/mips/include/asm/atomic.h |    4 ++++
>   2 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
> index cdaae94..ef3d8ca 100644
> --- a/arch/mips/Kconfig
> +++ b/arch/mips/Kconfig
> @@ -4,6 +4,7 @@ config MIPS
>   	select HAVE_GENERIC_DMA_COHERENT
>   	select HAVE_IDE
>   	select HAVE_OPROFILE
> +	select GENERIC_ATOMIC64 if !64BIT
>   	select HAVE_ARCH_KGDB
>   	select HAVE_FUNCTION_TRACER
>   	select HAVE_FUNCTION_TRACE_MCOUNT_TEST
> diff --git a/arch/mips/include/asm/atomic.h b/arch/mips/include/asm/atomic.h
> index 59dc0c7..23990cb 100644
> --- a/arch/mips/include/asm/atomic.h
> +++ b/arch/mips/include/asm/atomic.h
> @@ -782,6 +782,10 @@ static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
>    */
>   #define atomic64_add_negative(i, v) (atomic64_add_return(i, (v))<  0)
>
> +#else /* ! CONFIG_64BIT */
> +
> +#include<asm-generic/atomic64.h>
> +
>   #endif /* CONFIG_64BIT */
>
>   /*