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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-01-04 15:09:05 -0800
committerIngo Molnar <mingo@elte.hu>2010-01-13 09:06:03 +0100
commiteb1ba45f1e7f6e626fefc063b340c7cbec9bd8c7 (patch)
treee5d37e450c3c2c96863060c9a7b51a90c03fe363 /kernel/rcutree.c
parent39c0bbfc07c6e28db7346d0e11106f2d045d3035 (diff)
rcu: Eliminate second argument of rcu_process_dyntick()
At this point, the second argument to all calls to rcu_process_dyntick() is a function of the same field of the structure passed in as the first argument, namely, rsp->gpnum-1. So propagate rsp->gpnum-1 to all uses of the second argument within rcu_process_dyntick() and then eliminate the second argument. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: laijs@cn.fujitsu.com Cc: dipankar@in.ibm.com Cc: mathieu.desnoyers@polymtl.ca Cc: josh@joshtriplett.org Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org Cc: Valdis.Kletnieks@vt.edu Cc: dhowells@redhat.com LKML-Reference: <12626465503786-git-send-email-> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/rcutree.c')
-rw-r--r--kernel/rcutree.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 62b64332eff..c7d00700fc4 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1147,7 +1147,7 @@ void rcu_check_callbacks(int cpu, int user)
* Returns 1 if the current grace period ends while scanning (possibly
* because we made it end).
*/
-static int rcu_process_dyntick(struct rcu_state *rsp, long lastcomp,
+static int rcu_process_dyntick(struct rcu_state *rsp,
int (*f)(struct rcu_data *))
{
unsigned long bit;
@@ -1159,7 +1159,7 @@ static int rcu_process_dyntick(struct rcu_state *rsp, long lastcomp,
rcu_for_each_leaf_node(rsp, rnp) {
mask = 0;
spin_lock_irqsave(&rnp->lock, flags);
- if (rnp->completed != lastcomp) {
+ if (rnp->completed != rsp->gpnum - 1) {
spin_unlock_irqrestore(&rnp->lock, flags);
return 1;
}
@@ -1173,7 +1173,7 @@ static int rcu_process_dyntick(struct rcu_state *rsp, long lastcomp,
if ((rnp->qsmask & bit) != 0 && f(rsp->rda[cpu]))
mask |= bit;
}
- if (mask != 0 && rnp->completed == lastcomp) {
+ if (mask != 0 && rnp->completed == rsp->gpnum - 1) {
/* rcu_report_qs_rnp() releases rnp->lock. */
rcu_report_qs_rnp(mask, rsp, rnp, flags);
@@ -1226,7 +1226,7 @@ static void force_quiescent_state(struct rcu_state *rsp, int relaxed)
break; /* So gcc recognizes the dead code. */
/* Record dyntick-idle state. */
- gpdone = rcu_process_dyntick(rsp, rsp->gpnum - 1,
+ gpdone = rcu_process_dyntick(rsp,
dyntick_save_progress_counter);
spin_lock(&rnp->lock); /* irqs already disabled */
if (gpdone)
@@ -1249,8 +1249,7 @@ static void force_quiescent_state(struct rcu_state *rsp, int relaxed)
/* Check dyntick-idle state, send IPI to laggarts. */
spin_unlock(&rnp->lock); /* irqs remain disabled */
- gpdone = rcu_process_dyntick(rsp, rsp->gpnum - 1,
- rcu_implicit_dynticks_qs);
+ gpdone = rcu_process_dyntick(rsp, rcu_implicit_dynticks_qs);
/* Leave state in case more forcing is required. */