[haiku-commits] Re: haiku: hrev46918 - in src/system: libroot/os/arch/arm kernel
- From: Pawel Dziepak <pdziepak@xxxxxxxxxxx>
- To: haiku-commits@xxxxxxxxxxxxx
- Date: Sun, 23 Feb 2014 19:54:32 +0100
> ARM Atomics: implement __sync_syncronize
>
> GCC doesn't provide an ARM implementation of it. It's easy to write one
> for ARMv6 and above, while older archs will need this implemented as a
> syscall just like other atomics.
Does __sync_synchronize() really need to be anything more than a
simple compiler-only barrier on ARMv5 and older?
> +FUNCTION(__sync_synchronize):
> + dmb
> + bx lr
> +FUNCTION_END(__sync_synchronize)
I don't think that dmb is available on all ARMv6 processors (namely, ARM11).
Paweł
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