linux-kernel - [RFC PATCH 02/11] sched: Fix indentations in find_busiest

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Date:	Wed, 25 Mar 2009 14:43:40 +0530
From:	Gautham R Shenoy <ego@...ibm.com>
To:	"Ingo Molnar" <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"Vaidyanathan Srinivasan" <svaidy@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	"Balbir Singh" <balbir@...ibm.com>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	"Dhaval Giani" <dhaval@...ux.vnet.ibm.com>,
	Bharata B Rao <bharata@...ux.vnet.ibm.com>,
	Gautham R Shenoy <ego@...ibm.com>
Subject: [RFC PATCH 02/11] sched: Fix indentations in find_busiest_group using
	gotos.

Some indentations in find_busiest_group() can minimized by using
early exits with the help of gotos. This improves readability in a couple of
cases.

Signed-off-by: Gautham R Shenoy <ego@...ibm.com>
---

 kernel/sched.c |   32 +++++++++++++++++---------------
 1 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 0b65f8c..d95dcc0 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3299,14 +3299,14 @@ find_busiest_group(struct sched_domain *sd, int this_cpu,
 		 * capacity but still has some space to pick up some load
 		 * from other group and save more power
 		 */
-		if (sum_nr_running <= group_capacity - 1) {
-			if (sum_nr_running > leader_nr_running ||
-			    (sum_nr_running == leader_nr_running &&
-			     group_first_cpu(group) <
-			     group_first_cpu(group_leader))) {
-				group_leader = group;
-				leader_nr_running = sum_nr_running;
-			}
+		if (sum_nr_running > group_capacity - 1)
+			goto group_next;
+
+		if (sum_nr_running > leader_nr_running ||
+		    (sum_nr_running == leader_nr_running &&
+		     group_first_cpu(group) < group_first_cpu(group_leader))) {
+			group_leader = group;
+			leader_nr_running = sum_nr_running;
 		}
 group_next:
 #endif
@@ -3427,14 +3427,16 @@ out_balanced:
 	if (idle == CPU_NOT_IDLE || !(sd->flags & SD_POWERSAVINGS_BALANCE))
 		goto ret;
 
-	if (this == group_leader && group_leader != group_min) {
-		*imbalance = min_load_per_task;
-		if (sched_mc_power_savings >= POWERSAVINGS_BALANCE_WAKEUP) {
-			cpu_rq(this_cpu)->rd->sched_mc_preferred_wakeup_cpu =
-				group_first_cpu(group_leader);
-		}
-		return group_min;
+	if (this != group_leader || group_leader == group_min)
+		goto ret;
+
+	*imbalance = min_load_per_task;
+	if (sched_mc_power_savings >= POWERSAVINGS_BALANCE_WAKEUP) {
+		cpu_rq(this_cpu)->rd->sched_mc_preferred_wakeup_cpu =
+			group_first_cpu(group_leader);
 	}
+	return group_min;
+
 #endif
 ret:
 	*imbalance = 0;

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