[PATCH 09/14] ARM: v6k: select generic atomic64 code according to V6 variants

Will Deacon will.deacon at arm.com
Tue Jan 18 05:24:20 EST 2011


> If CONFIG_CPU_V6 is enabled, avoid using the double-word exclusive
> instructions in the kernel's atomic implementations as these are not
> supported.  Fall back to the generic spinlock code instead.
> 
> Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
> ---
>  arch/arm/Kconfig |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 95ba92f..283d7b9 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -7,7 +7,7 @@ config ARM
>  	select HAVE_MEMBLOCK
>  	select RTC_LIB
>  	select SYS_SUPPORTS_APM_EMULATION
> -	select GENERIC_ATOMIC64 if (!CPU_32v6K || !AEABI)
> +	select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
>  	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
>  	select HAVE_ARCH_KGDB
>  	select HAVE_KPROBES if (!XIP_KERNEL && !THUMB2_KERNEL)

Acked-by: Will Deacon <will.deacon at arm.com>

Thanks,

Will






More information about the linux-arm-kernel mailing list