Re: [Xen-devel] [PATCH v4] arm: remove !CPU_V6 and !GENERIC_ATOMIC64 build dependencies for XEN

[Will Deacon <will.deacon@xxxxxxx>]

On Tue, Jan 21, 2014 at 01:44:24PM +0000, Stefano Stabellini wrote:
> Remove !GENERIC_ATOMIC64 build dependency:
> - introduce xen_atomic64_xchg
> - use it to implement xchg_xen_ulong
> 
> Remove !CPU_V6 build dependency:
> - introduce __cmpxchg8 and __cmpxchg16, compiled even ifdef
>   CONFIG_CPU_V6
> - implement sync_cmpxchg using __cmpxchg8 and __cmpxchg16
> 
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> CC: arnd@xxxxxxxx
> CC: linux@xxxxxxxxxxxxxxxx
> CC: will.deacon@xxxxxxx
> CC: catalin.marinas@xxxxxxx
> CC: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> CC: linux-kernel@xxxxxxxxxxxxxxx
> CC: xen-devel@xxxxxxxxxxxxxxxxxxxx

  Reviewed-by: Will Deacon <will.deacon@xxxxxxx>

Cheers Stefano,

Will

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