Single byte Atomic::cmpxchg implementation
David Holmes
david.holmes at oracle.com
Thu Sep 11 13:16:03 UTC 2014
On 11/09/2014 9:46 PM, Erik Österlund wrote:
> On 11 Sep 2014, at 13:24, Andrew Haley <aph at redhat.com> wrote:
>> Sure; just to be clear, I wasn't thinking about __kernel_cmpxchg, bug a
>> GCC builtin. AFAIK __kernel_cmpxchg isn't used for anything on
>> AArch64, and we certainly don't need it.
>
> Sorry, I seem to have looked at defined(ARM) + zero where __kernel_cmpxchg is the implementation of choice rather than the AArch64-port specific code. Perhaps somebody else is responsible for that...
Yes the zero port is separate again. The kernel helper is needed on ARMv5.
David
> /Erik
>
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