Messages in this thread | | | Date | Sun, 05 Mar 2006 01:12:47 +1100 | From | Nick Piggin <> | Subject | Re: 2.6.16-rc regression: m68k CONFIG_RMW_INSNS=n compile broken |
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Roman Zippel wrote: > Hi, > > On Fri, 3 Mar 2006, Andrew Morton wrote: > > >>Yes, we now require cmpxchg of all architectures. > > > Actually I'd prefer if we used atomic_cmpxchg() instead. > The cmpxchg() emulation was never added for a good reason - to keep code > from assuming it can be used it for userspace synchronisation. Using an > atomic_t here would probably get at least some attention. >
Yes, I guess that's what Andrew meant. The reason we can require atomic_cmpxchg of all architectures is because it is only guaranteed to work on atomic_t.
Glad to hear it won't be a problem for you though.
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