[Xen-devel] [PATCH v2 1/3] xen: Some code motion to avoid having to do forward-declaration

[George Dunlap <george.dunlap@xxxxxxxxxx>]

For sched_credit2, move the vcpu insert / remove / free functions near the 
domain
insert / remove / alloc / free functions (and after cpu_pick).

For sched_rt, move rt_cpu_pick() further up.

This is pure code motion; no functional change.

Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxx>
Reviewed-by: Meng Xu <mengxu@xxxxxxxxxxxxx>​
---
v2:
- Rebase on top of Dario's series

I've retained Meng Xu's Reviewed-by since the sched_rt part didn't change.

CC: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
CC: Anshul Makkar <anshul.makkar@xxxxxxxxxx>
CC: Meng Xu <mengxu@xxxxxxxxxxxxx>
---
 xen/common/sched_credit2.c | 106 ++++++++++++++++++++++-----------------------
 xen/common/sched_rt.c      |  46 ++++++++++----------
 2 files changed, 76 insertions(+), 76 deletions(-)

diff --git a/xen/common/sched_credit2.c b/xen/common/sched_credit2.c
index 1d79de0..3d2716a 100644
--- a/xen/common/sched_credit2.c
+++ b/xen/common/sched_credit2.c
@@ -1348,59 +1348,6 @@ runq_deassign(const struct scheduler *ops, struct vcpu 
*vc)
 }
 
 static void
-csched2_vcpu_insert(const struct scheduler *ops, struct vcpu *vc)
-{
-    struct csched2_vcpu *svc = vc->sched_priv;
-    struct csched2_dom * const sdom = svc->sdom;
-    spinlock_t *lock;
-
-    ASSERT(!is_idle_vcpu(vc));
-    ASSERT(list_empty(&svc->runq_elem));
-
-    /* Add vcpu to runqueue of initial processor */
-    lock = vcpu_schedule_lock_irq(vc);
-
-    runq_assign(ops, vc);
-
-    vcpu_schedule_unlock_irq(lock, vc);
-
-    sdom->nr_vcpus++;
-
-    SCHED_STAT_CRANK(vcpu_insert);
-
-    CSCHED2_VCPU_CHECK(vc);
-}
-
-static void
-csched2_free_vdata(const struct scheduler *ops, void *priv)
-{
-    struct csched2_vcpu *svc = priv;
-
-    xfree(svc);
-}
-
-static void
-csched2_vcpu_remove(const struct scheduler *ops, struct vcpu *vc)
-{
-    struct csched2_vcpu * const svc = CSCHED2_VCPU(vc);
-    spinlock_t *lock;
-
-    ASSERT(!is_idle_vcpu(vc));
-    ASSERT(list_empty(&svc->runq_elem));
-
-    SCHED_STAT_CRANK(vcpu_remove);
-
-    /* Remove from runqueue */
-    lock = vcpu_schedule_lock_irq(vc);
-
-    runq_deassign(ops, vc);
-
-    vcpu_schedule_unlock_irq(lock, vc);
-
-    svc->sdom->nr_vcpus--;
-}
-
-static void
 csched2_vcpu_sleep(const struct scheduler *ops, struct vcpu *vc)
 {
     struct csched2_vcpu * const svc = CSCHED2_VCPU(vc);
@@ -2098,6 +2045,59 @@ csched2_dom_destroy(const struct scheduler *ops, struct 
domain *dom)
     csched2_free_domdata(ops, CSCHED2_DOM(dom));
 }
 
+static void
+csched2_vcpu_insert(const struct scheduler *ops, struct vcpu *vc)
+{
+    struct csched2_vcpu *svc = vc->sched_priv;
+    struct csched2_dom * const sdom = svc->sdom;
+    spinlock_t *lock;
+
+    ASSERT(!is_idle_vcpu(vc));
+    ASSERT(list_empty(&svc->runq_elem));
+
+    /* Add vcpu to runqueue of initial processor */
+    lock = vcpu_schedule_lock_irq(vc);
+
+    runq_assign(ops, vc);
+
+    vcpu_schedule_unlock_irq(lock, vc);
+
+    sdom->nr_vcpus++;
+
+    SCHED_STAT_CRANK(vcpu_insert);
+
+    CSCHED2_VCPU_CHECK(vc);
+}
+
+static void
+csched2_free_vdata(const struct scheduler *ops, void *priv)
+{
+    struct csched2_vcpu *svc = priv;
+
+    xfree(svc);
+}
+
+static void
+csched2_vcpu_remove(const struct scheduler *ops, struct vcpu *vc)
+{
+    struct csched2_vcpu * const svc = CSCHED2_VCPU(vc);
+    spinlock_t *lock;
+
+    ASSERT(!is_idle_vcpu(vc));
+    ASSERT(list_empty(&svc->runq_elem));
+
+    SCHED_STAT_CRANK(vcpu_remove);
+
+    /* Remove from runqueue */
+    lock = vcpu_schedule_lock_irq(vc);
+
+    runq_deassign(ops, vc);
+
+    vcpu_schedule_unlock_irq(lock, vc);
+
+    svc->sdom->nr_vcpus--;
+}
+
 /* How long should we let this vcpu run for? */
 static s_time_t
 csched2_runtime(const struct scheduler *ops, int cpu, struct csched2_vcpu 
*snext)
diff --git a/xen/common/sched_rt.c b/xen/common/sched_rt.c
index 98524a6..bd3a2a0 100644
--- a/xen/common/sched_rt.c
+++ b/xen/common/sched_rt.c
@@ -582,6 +582,29 @@ replq_reinsert(const struct scheduler *ops, struct rt_vcpu 
*svc)
 }
 
 /*
+ * Pick a valid CPU for the vcpu vc
+ * Valid CPU of a vcpu is intesection of vcpu's affinity
+ * and available cpus
+ */
+static int
+rt_cpu_pick(const struct scheduler *ops, struct vcpu *vc)
+{
+    cpumask_t cpus;
+    cpumask_t *online;
+    int cpu;
+
+    online = cpupool_domain_cpumask(vc->domain);
+    cpumask_and(&cpus, online, vc->cpu_hard_affinity);
+
+    cpu = cpumask_test_cpu(vc->processor, &cpus)
+            ? vc->processor
+            : cpumask_cycle(vc->processor, &cpus);
+    ASSERT( !cpumask_empty(&cpus) && cpumask_test_cpu(cpu, &cpus) );
+
+    return cpu;
+}
+
+/*
  * Init/Free related code
  */
 static int
@@ -894,29 +917,6 @@ rt_vcpu_remove(const struct scheduler *ops, struct vcpu 
*vc)
 }
 
 /*
- * Pick a valid CPU for the vcpu vc
- * Valid CPU of a vcpu is intesection of vcpu's affinity
- * and available cpus
- */
-static int
-rt_cpu_pick(const struct scheduler *ops, struct vcpu *vc)
-{
-    cpumask_t cpus;
-    cpumask_t *online;
-    int cpu;
-
-    online = cpupool_domain_cpumask(vc->domain);
-    cpumask_and(&cpus, online, vc->cpu_hard_affinity);
-
-    cpu = cpumask_test_cpu(vc->processor, &cpus)
-            ? vc->processor
-            : cpumask_cycle(vc->processor, &cpus);
-    ASSERT( !cpumask_empty(&cpus) && cpumask_test_cpu(cpu, &cpus) );
-
-    return cpu;
-}
-
-/*
  * Burn budget in nanosecond granularity
  */
 static void
-- 
2.1.4


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