[PATCH v2 6/9] xen/sys-hypervisor: Add release callback to hyp_sysfs_kobj_type

[Ian Rogers <irogers@google.com>]

hypervisor_init() in drivers/base/hypervisor.c creates hypervisor_kobj
with kobject_create_and_add() (which allocates a dynamic kobject using
dynamic_kobj_ktype), and hypervisor_subsys_init() in
drivers/xen/sys-hypervisor.c then overwrites hypervisor_kobj->ktype with
&hyp_sysfs_kobj_type, which had no .release callback.

Add hyp_sysfs_release() calling kfree(kobj) to preserve the dynamic
kobject release behavior.

Fixes: cff7e81b3dd7 ("xen: add /sys/hypervisor support")
Signed-off-by: Ian Rogers <irogers@google.com>
---
 drivers/xen/sys-hypervisor.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/xen/sys-hypervisor.c b/drivers/xen/sys-hypervisor.c
index 91923242a5ae..0e8a2cd69fd6 100644
--- a/drivers/xen/sys-hypervisor.c
+++ b/drivers/xen/sys-hypervisor.c
@@ -659,7 +659,13 @@ static const struct sysfs_ops hyp_sysfs_ops = {
 	.store = hyp_sysfs_store,
 };
 
+static void hyp_sysfs_release(struct kobject *kobj)
+{
+	kfree(kobj);
+}
+
 static const struct kobj_type hyp_sysfs_kobj_type = {
+	.release = hyp_sysfs_release,
 	.sysfs_ops = &hyp_sysfs_ops,
 };
 
-- 
2.56.0.313.g2479322e68-goog