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Subject[tip:sched/balancing] sched: Fix indentations in find_busiest_group() using gotos
Commit-ID:  6dfdb0629019f307ab18864b1fd3e5dbb02f383c
Gitweb: http://git.kernel.org/tip/6dfdb0629019f307ab18864b1fd3e5dbb02f383c
Author: Gautham R Shenoy <ego@in.ibm.com>
AuthorDate: Wed, 25 Mar 2009 14:43:40 +0530
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Wed, 25 Mar 2009 10:30:44 +0100

sched: Fix indentations in find_busiest_group() using gotos

Impact: cleanup

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@in.ibm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Balbir Singh" <balbir@in.ibm.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: "Dhaval Giani" <dhaval@linux.vnet.ibm.com>
Cc: Bharata B Rao <bharata@linux.vnet.ibm.com>
Cc: "Vaidyanathan Srinivasan" <svaidy@linux.vnet.ibm.com>
LKML-Reference: <20090325091340.13992.45062.stgit@sofia.in.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>


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

diff --git a/kernel/sched.c b/kernel/sched.c
index 6aec1e7..f87adbe 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3403,14 +3403,14 @@ 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
@@ -3531,14 +3531,16 @@ 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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