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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-03-19 12:38:24 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-06-10 13:39:44 -0700
commit05eb552bf5ed9e7277bdc9c273ed2f4e9b7dc3e5 (patch)
tree9355073909b25cf7ec13f8157326b9f321711d92 /kernel/rcutree.c
parentce3d9c03d1fa079678cc8df1517011e215517cda (diff)
downloadop-kernel-dev-05eb552bf5ed9e7277bdc9c273ed2f4e9b7dc3e5.zip
op-kernel-dev-05eb552bf5ed9e7277bdc9c273ed2f4e9b7dc3e5.tar.gz
rcu: Move redundant call to note_gp_changes() into called function
The __rcu_process_callbacks() invokes note_gp_changes() immediately before invoking rcu_check_quiescent_state(), which conditionally invokes that same function. This commit therefore eliminates the call to note_gp_changes() in __rcu_process_callbacks() in favor of making unconditional to call from rcu_check_quiescent_state() to note_gp_changes(). Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcutree.c')
-rw-r--r--kernel/rcutree.c10
1 files changed, 2 insertions, 8 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 391bd72..7a5194e 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1716,11 +1716,8 @@ rcu_report_qs_rdp(int cpu, struct rcu_state *rsp, struct rcu_data *rdp)
static void
rcu_check_quiescent_state(struct rcu_state *rsp, struct rcu_data *rdp)
{
- /* If there is now a new grace period, record and return. */
- if (rdp->gpnum != rsp->gpnum) {
- note_gp_changes(rsp, rdp);
- return;
- }
+ /* Check for grace-period ends and beginnings. */
+ note_gp_changes(rsp, rdp);
/*
* Does this CPU still need to do its part for current grace period?
@@ -2184,9 +2181,6 @@ __rcu_process_callbacks(struct rcu_state *rsp)
WARN_ON_ONCE(rdp->beenonline == 0);
- /* Handle the end of a grace period that some other CPU ended. */
- note_gp_changes(rsp, rdp);
-
/* Update RCU state based on any recent quiescent states. */
rcu_check_quiescent_state(rsp, rdp);
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