From: "Paul E. McKenney" <paul...@linux.vnet.ibm.com>
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 <paul...@linux.vnet.ibm.com>
---
kernel/rcutree.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index a57bac3..dded193 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1297,7 +1297,7 @@ __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);
@@ -1316,19 +1316,20 @@ 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);
}
@@ -1367,7 +1368,7 @@ 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);
@@ -1386,7 +1387,7 @@ 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);
}
/*
--
1.8.1.5
--
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/
