sched/fair: always used unsigned long for utilization

Utilization and capacity are tracked as unsigned long, however some
functions using them return an int which is ultimately assigned back to
unsigned long variables.

Since there is not scope on using a different and signed type, this
consolidate the signature of functions returning utilization to always
use the native type.
As well as improving code consistency this is expected also benefits
code paths where utilizations should be clamped by avoiding further type
conversions or ugly type casts.

Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
Reviewed-by: Chris Redpath <chris.redpath@arm.com>
Reviewed-by: Brendan Jackman <brendan.jackman@arm.com>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Morten Rasmussen <morten.rasmussen@arm.com>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index d56d33dd94b5cbb1f45073edf0502d84d128698a..47b56833a146d097c39522ab0e0b53768cb2d1da 100644 (file)
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6060,8 +6060,8 @@ static int wake_affine(struct sched_domain *sd, struct task_struct *p,
        return affine;
 }
 
-static inline int task_util(struct task_struct *p);
-static int cpu_util_wake(int cpu, struct task_struct *p);
+static inline unsigned long task_util(struct task_struct *p);
+static unsigned long cpu_util_wake(int cpu, struct task_struct *p);
 
 static unsigned long capacity_spare_wake(int cpu, struct task_struct *p)
 {
@@ -6516,7 +6516,7 @@ static int select_idle_sibling(struct task_struct *p, int prev, int target)
        return target;
 }
 
-static inline int task_util(struct task_struct *p)
+static inline unsigned long task_util(struct task_struct *p)
 {
        return p->se.avg.util_avg;
 }
@@ -6525,7 +6525,7 @@ static inline int task_util(struct task_struct *p)
  * cpu_util_wake: Compute cpu utilization with any contributions from
  * the waking task p removed.
  */
-static int cpu_util_wake(int cpu, struct task_struct *p)
+static unsigned long cpu_util_wake(int cpu, struct task_struct *p)
 {
        unsigned long util, capacity;