[PATCH] atomic64: No need for CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Sep 08, 2016 at 09:28:18AM -0700, Vineet Gupta wrote:
> This came to light when implementing native 64-bit atomics for ARCv2.
> 
> The atomic64 self-test code uses CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
> to check whether atomic64_dec_if_positive() is available.
> It seems it was needed when not every arch defined it.
> However as of current code the Kconfig option seems needless
> 
> - for CONFIG_GENERIC_ATOMIC64 it is auto-enabled in lib/Kconfig and a
>   generic definition of API is present lib/atomic64.c
> - arches with native 64-bit atomics select it in arch/*/Kconfig and
>   define the API in their headers
> 
> So I see no point in keeping the Kconfig option
> 
> Compile tested for 2 representatives:
>  - blackfin (CONFIG_GENERIC_ATOMIC64)
>  - x86 (!CONFIG_GENERIC_ATOMIC64)
> 
> Also logistics wise it seemed simpler to just do this in 1 patch vs.
> splitting per arch - but I can break it up if maintainer feel that
> is better to avoid conflicts.

Works for me; you want me to take this, or do you need it for you ARCv2
patches?



[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux