From: Jonathan Creekmore <jonathan.creekmore@gmail.com>
Date: Thu, 21 Jan 2016 15:06:36 +0000 (+0100)
Subject: sched: register the schedulers into the list
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=18c8d613aa8d8d6dc0da1a70d55249ddd78e28f4;p=people%2Fliuw%2Flibxenctrl-split%2Fxen.git

sched: register the schedulers into the list

Adds a simple macro to place a pointer to a scheduler into an array
section at compile time. Also, goes ahead and generates the array
entries with each of the schedulers.

Signed-off-by: Jonathan Creekmore <jonathan.creekmore@gmail.com>
Acked-by: Dario Faggioli <dario.faggioli@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Doug Goldstein <cardoe@cardoe.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---

diff --git a/xen/common/sched_arinc653.c b/xen/common/sched_arinc653.c
index dbe02ed47a..3b59514644 100644
--- a/xen/common/sched_arinc653.c
+++ b/xen/common/sched_arinc653.c
@@ -767,6 +767,8 @@ const struct scheduler sched_arinc653_def = {
     .tick_resume    = NULL,
 };
 
+REGISTER_SCHEDULER(sched_arinc653_def);
+
 /*
  * Local variables:
  * mode: C
diff --git a/xen/common/sched_credit.c b/xen/common/sched_credit.c
index 02afddfd2b..1645f9c2b6 100644
--- a/xen/common/sched_credit.c
+++ b/xen/common/sched_credit.c
@@ -2027,3 +2027,5 @@ const struct scheduler sched_credit_def = {
     .tick_suspend   = csched_tick_suspend,
     .tick_resume    = csched_tick_resume,
 };
+
+REGISTER_SCHEDULER(sched_credit_def);
diff --git a/xen/common/sched_credit2.c b/xen/common/sched_credit2.c
index 3c49ffa1b1..38b02d0643 100644
--- a/xen/common/sched_credit2.c
+++ b/xen/common/sched_credit2.c
@@ -2228,3 +2228,5 @@ const struct scheduler sched_credit2_def = {
     .alloc_domdata  = csched2_alloc_domdata,
     .free_domdata   = csched2_free_domdata,
 };
+
+REGISTER_SCHEDULER(sched_credit2_def);
diff --git a/xen/common/sched_rt.c b/xen/common/sched_rt.c
index 3f1d047efe..7640cd0872 100644
--- a/xen/common/sched_rt.c
+++ b/xen/common/sched_rt.c
@@ -1199,3 +1199,5 @@ const struct scheduler sched_rtds_def = {
     .wake           = rt_vcpu_wake,
     .context_saved  = rt_context_saved,
 };
+
+REGISTER_SCHEDULER(sched_rtds_def);
diff --git a/xen/include/xen/sched-if.h b/xen/include/xen/sched-if.h
index 493d43fd24..9c6e0f5342 100644
--- a/xen/include/xen/sched-if.h
+++ b/xen/include/xen/sched-if.h
@@ -170,6 +170,8 @@ extern const struct scheduler sched_credit2_def;
 extern const struct scheduler sched_arinc653_def;
 extern const struct scheduler sched_rtds_def;
 
+#define REGISTER_SCHEDULER(x) static const struct scheduler *x##_entry \
+  __used_section(".data.schedulers") = &x;
 
 struct cpupool
 {