On Thu, May 09, 2019 at 05:07:40PM +1200, Chris Packham wrote:
> __ha_cas_dw() is used in fd_rm_from_fd_list() and when built without
> USE_THREADS=1 the linker fails to find __ha_cas_dw(). Add a definition
> of __ha_cas_dw() for the #ifndef USE_THREADS case.

Just found your patch, I think it's indeed OK to fall back to
HA_ATOMIC_CAS in this case since we won't use atomic instructions.
I'd like that we do a bit of tidying in this area so that it's
clearer which functions are always atomic and which ones possibly
are not, but for now that's OK. I've merged it now.


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