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Date: Thu, 19 Aug 2010 17:31:46 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca> Cc: Changli Gao <xiaosuo@...il.com>, Patrick McHardy <kaber@...sh.net>, "David S. Miller" <davem@...emloft.net>, netfilter-devel@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] netfilter: save the hash of the tuple in the original direction for latter use Le jeudi 19 août 2010 à 08:35 -0400, Mathieu Desnoyers a écrit : > I made sure it was available on all architectures with that patchset, > with the intended goal to used it (cmpxchg, cmpxchg_local for 32/64-bit > and cmpxchg64, cmpxchg64_local for 64-bit) in arch-agnostic tracer code. > > I added a cmpxchg emulated with irqs off for uniprocessor-only > architectures that did not have CAS support. sparc32 has moved to a > hashed locked scheme for its atomic operations long ago, which makes the > full 32 bits available. > > So, all in all, I'd be surprised if an architecture would lack > cmpxchg() today. It might be possible that a new architecture that just > came in would not have taken care of deploying cmpxchg, but that should > be easily fixable. Thats pretty cool, thanks for clarification ! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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