rcu: Rename note_new_gpnum() to note_gp_changes()

Because note_new_gpnum() now also checks for the ends of old grace periods,
this commit changes its name to note_gp_changes().  Later commits will merge
rcu_process_gp_end() into note_gp_changes().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 54aba759b609ee63fac76e8caf2f01edda918457..7eb2bc95300a1c8b42f58d1846a0fc558c7e9706 100644 (file)
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1307,7 +1307,7 @@ __rcu_process_gp_end(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_dat
  * ->lock of the leaf rcu_node structure corresponding to the current CPU,
  *  and must have irqs disabled.
  */
-static void __note_new_gpnum(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_data *rdp)
+static void __note_gp_changes(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_data *rdp)
 {
        /* Handle the ends of any preceding grace periods first. */
        __rcu_process_gp_end(rsp, rnp, rdp);
@@ -1326,19 +1326,20 @@ static void __note_new_gpnum(struct rcu_state *rsp, struct rcu_node *rnp, struct
        }
 }
 
-static void note_new_gpnum(struct rcu_state *rsp, struct rcu_data *rdp)
+static void note_gp_changes(struct rcu_state *rsp, struct rcu_data *rdp)
 {
        unsigned long flags;
        struct rcu_node *rnp;
 
        local_irq_save(flags);
        rnp = rdp->mynode;
-       if (rdp->gpnum == ACCESS_ONCE(rnp->gpnum) || /* outside lock. */
+       if ((rdp->gpnum == ACCESS_ONCE(rnp->gpnum) &&
+            rdp->completed == ACCESS_ONCE(rnp->completed)) || /* w/out lock. */
            !raw_spin_trylock(&rnp->lock)) { /* irqs already off, so later. */
                local_irq_restore(flags);
                return;
        }
-       __note_new_gpnum(rsp, rnp, rdp);
+       __note_gp_changes(rsp, rnp, rdp);
        raw_spin_unlock_irqrestore(&rnp->lock, flags);
 }
 
@@ -1377,7 +1378,7 @@ check_for_new_grace_period(struct rcu_state *rsp, struct rcu_data *rdp)
 
        local_irq_save(flags);
        if (rdp->gpnum != rsp->gpnum) {
-               note_new_gpnum(rsp, rdp);
+               note_gp_changes(rsp, rdp);
                ret = 1;
        }
        local_irq_restore(flags);
@@ -1396,7 +1397,7 @@ rcu_start_gp_per_cpu(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_dat
        __rcu_process_gp_end(rsp, rnp, rdp);
 
        /* Set state so that this CPU will detect the next quiescent state. */
-       __note_new_gpnum(rsp, rnp, rdp);
+       __note_gp_changes(rsp, rnp, rdp);
 }
 
 /*