On Sat, Nov 03, 2012 at 12:01:47AM +0800, Shan Wei wrote: > From: Shan Wei <davids...@tencent.com> > > Signed-off-by: Shan Wei <davids...@tencent.com> > --- > kernel/rcutree.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/kernel/rcutree.c b/kernel/rcutree.c > index 74df86b..441b945 100644 > --- a/kernel/rcutree.c > +++ b/kernel/rcutree.c > @@ -1960,7 +1960,7 @@ static void force_quiescent_state(struct rcu_state *rsp) > struct rcu_node *rnp_old = NULL; > > /* Funnel through hierarchy to reduce memory contention. */ > - rnp = per_cpu_ptr(rsp->rda, raw_smp_processor_id())->mynode; > + rnp = __this_cpu_read(rsp->rda->mynode);
OK, I'll bite... Why this instead of: rnp = __this_cpu_read(rsp->rda)->mynode; Thanx, Paul > for (; rnp != NULL; rnp = rnp->parent) { > ret = (ACCESS_ONCE(rsp->gp_flags) & RCU_GP_FLAG_FQS) || > !raw_spin_trylock(&rnp->fqslock); > -- > 1.7.1 > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/