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rcu: Convert rcu_gpnum_ovf() to ->gp_seq
This commit converts rcu_gpnum_ovf() to use ->gp_seq instead of ->gpnum. Same size unsigned long, so same approach. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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1 changed files with 3 additions and 2 deletions
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@ -1089,14 +1089,15 @@ static int rcu_is_cpu_rrupt_from_idle(void)
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/*
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* We are reporting a quiescent state on behalf of some other CPU, so
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* it is our responsibility to check for and handle potential overflow
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* of the rcu_node ->gpnum counter with respect to the rcu_data counters.
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* of the rcu_node ->gp_seq counter with respect to the rcu_data counters.
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* After all, the CPU might be in deep idle state, and thus executing no
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* code whatsoever.
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*/
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static void rcu_gpnum_ovf(struct rcu_node *rnp, struct rcu_data *rdp)
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{
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raw_lockdep_assert_held_rcu_node(rnp);
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if (ULONG_CMP_LT(READ_ONCE(rdp->gpnum) + ULONG_MAX / 4, rnp->gpnum))
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if (ULONG_CMP_LT(rcu_seq_current(&rdp->gp_seq) + ULONG_MAX / 4,
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rnp->gp_seq))
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WRITE_ONCE(rdp->gpwrap, true);
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if (ULONG_CMP_LT(rdp->rcu_iw_gpnum + ULONG_MAX / 4, rnp->gpnum))
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rdp->rcu_iw_gpnum = rnp->gpnum + ULONG_MAX / 4;
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