make a bunch of struct bus_type const.

TODO: break up into submittable pieces

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index 2c07387..733b5129 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -464,7 +464,7 @@ void spu_init_channels(struct spu *spu)
 }
 EXPORT_SYMBOL_GPL(spu_init_channels);
 
-static struct bus_type spu_subsys = {
+static const struct bus_type spu_subsys = {
 	.name = "spu",
 	.dev_name = "spu",
 };
diff --git a/arch/powerpc/platforms/ps3/system-bus.c b/arch/powerpc/platforms/ps3/system-bus.c
index afbaabf..c5b880c 100644
--- a/arch/powerpc/platforms/ps3/system-bus.c
+++ b/arch/powerpc/platforms/ps3/system-bus.c
@@ -465,7 +465,7 @@ static struct attribute *ps3_system_bus_dev_attrs[] = {
 };
 ATTRIBUTE_GROUPS(ps3_system_bus_dev);
 
-static struct bus_type ps3_system_bus_type = {
+static const struct bus_type ps3_system_bus_type = {
 	.name = "ps3_system_bus",
 	.match = ps3_system_bus_match,
 	.uevent = ps3_system_bus_uevent,
diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c
index 5e0a718..9136426 100644
--- a/arch/powerpc/platforms/pseries/cmm.c
+++ b/arch/powerpc/platforms/pseries/cmm.c
@@ -375,7 +375,7 @@ static struct device_attribute *cmm_attrs[] = {
 static DEVICE_ULONG_ATTR(simulate_loan_target_kb, 0644,
 			 simulate_loan_target_kb);
 
-static struct bus_type cmm_subsys = {
+static const struct bus_type cmm_subsys = {
 	.name = "cmm",
 	.dev_name = "cmm",
 };
diff --git a/arch/powerpc/platforms/pseries/suspend.c b/arch/powerpc/platforms/pseries/suspend.c
index 382003d..c51db63 100644
--- a/arch/powerpc/platforms/pseries/suspend.c
+++ b/arch/powerpc/platforms/pseries/suspend.c
@@ -126,7 +126,7 @@ static ssize_t show_hibernate(struct device *dev,
 
 static DEVICE_ATTR(hibernate, 0644, show_hibernate, store_hibernate);
 
-static struct bus_type suspend_subsys = {
+static const struct bus_type suspend_subsys = {
 	.name = "power",
 	.dev_name = "power",
 };
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 8060c28..5513ce0 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -12210,7 +12210,7 @@ static const struct attribute_group *pmu_dev_groups[] = {
 };
 
 static int pmu_bus_running;
-static struct bus_type pmu_bus = {
+static const struct bus_type pmu_bus = {
 	.name		= "event_source",
 	.dev_groups	= pmu_dev_groups,
 };