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SubjectRe: [PATCH 2/3 RFC paul/rcu/srcu] srcu: only increase the upper bit for srcu_read_lock()
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On Wed, 2012-02-22 at 17:29 +0800, Lai Jiangshan wrote:
> + ACCESS_ONCE(this_cpu_ptr(sp->per_cpu_ref)->c[idx]) += -1;

That just looks funny..


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