[Xenomai-git] Philippe Gerum : cobalt/sched: turn scheduler slot into a per-cpu variable

[git repository hosting]

Module: xenomai-forge
Branch: master
Commit: 167f7dcbbe65e33073e9fd62d2befef3e6316317
URL:    
http://git.xenomai.org/?p=xenomai-forge.git;a=commit;h=167f7dcbbe65e33073e9fd62d2befef3e6316317

Author: Philippe Gerum <r...@xenomai.org>
Date:   Tue Jul 30 16:42:09 2013 +0200

cobalt/sched: turn scheduler slot into a per-cpu variable

---

 include/cobalt/kernel/pod.h   |   10 ++++------
 include/cobalt/kernel/sched.h |    3 +++
 kernel/cobalt/pod.c           |    2 +-
 kernel/cobalt/sched.c         |    3 +++
 4 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/include/cobalt/kernel/pod.h b/include/cobalt/kernel/pod.h
index e8f69e4..5b8af19 100644
--- a/include/cobalt/kernel/pod.h
+++ b/include/cobalt/kernel/pod.h
@@ -59,8 +59,7 @@ struct xnsynch;
 
 struct xnpod {
        unsigned long status;     /*!< Status bitmask. */
-       xnsched_t sched[NR_CPUS];       /*!< Per-cpu scheduler slots. */
-       struct list_head threadq;       /*!< All existing threads. */
+       struct list_head threadq; /*!< All existing threads. */
        int nrthreads;
 #ifdef CONFIG_XENO_OPT_VFILE
        struct xnvfile_rev_tag threadlist_tag;
@@ -92,16 +91,15 @@ void __xnpod_schedule(struct xnsched *sched);
 
 void __xnpod_schedule_handler(void);
 
-       /* -- Beginning of the exported interface */
-
 static inline struct xnsched *xnpod_sched_slot(int cpu)
 {
-       return nkpod->sched + cpu;
+       return &per_cpu(nksched, cpu);
 }
 
 static inline struct xnsched *xnpod_current_sched(void)
 {
-       return xnpod_sched_slot(ipipe_processor_id());
+       /* IRQs off */
+       return __this_cpu_ptr(&nksched);
 }
 
 static inline int xnpod_active_p(void)
diff --git a/include/cobalt/kernel/sched.h b/include/cobalt/kernel/sched.h
index a5acc16..be3f2c5 100644
--- a/include/cobalt/kernel/sched.h
+++ b/include/cobalt/kernel/sched.h
@@ -28,6 +28,7 @@
 /*! \addtogroup sched
  *@{*/
 
+#include <linux/percpu.h>
 #include <cobalt/kernel/thread.h>
 #include <cobalt/kernel/schedqueue.h>
 #include <cobalt/kernel/sched-tp.h>
@@ -93,6 +94,8 @@ typedef struct xnsched {
 #endif
 } xnsched_t;
 
+DECLARE_PER_CPU(struct xnsched, nksched);
+
 union xnsched_policy_param;
 
 struct xnsched_class {
diff --git a/kernel/cobalt/pod.c b/kernel/cobalt/pod.c
index c4c8ea3..bb79139 100644
--- a/kernel/cobalt/pod.c
+++ b/kernel/cobalt/pod.c
@@ -260,7 +260,7 @@ int xnpod_init(void)
        xnheap_set_label(&kheap, "main heap");
 
        for_each_online_cpu(cpu) {
-               sched = &pod->sched[cpu];
+               sched = &per_cpu(nksched, cpu);
                xnsched_init(sched, cpu);
                if (xnarch_cpu_supported(cpu)) {
                        list_add_tail(&sched->rootcb.glink, &pod->threadq);
diff --git a/kernel/cobalt/sched.c b/kernel/cobalt/sched.c
index 1769586..c353674 100644
--- a/kernel/cobalt/sched.c
+++ b/kernel/cobalt/sched.c
@@ -30,6 +30,9 @@
 #include <cobalt/kernel/arith.h>
 #include <asm/xenomai/thread.h>
 
+DEFINE_PER_CPU(struct xnsched, nksched);
+EXPORT_PER_CPU_SYMBOL(nksched);
+
 static struct xnsched_class *xnsched_class_highest;
 
 #define for_each_xnsched_class(p) \


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