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authorMiroslav Benes <mbenes@suse.cz>2015-05-19 12:01:18 +0200
committerJiri Kosina <jkosina@suse.cz>2015-05-19 23:56:41 +0200
commitcad706df7e4a00a595f2662f32c0fc174aa4e61f (patch)
treecd289c2f2478ad3c269b00bf22d2bd39818d0df6
parent36e505c16e610403c110bab76a95cbfa0436a928 (diff)
livepatch: make kobject in klp_object statically allocated
Make kobj variable (of type struct kobject) statically allocated in klp_object structure. It will allow us to move in the func-object-patch hierarchy through kobject links. The only reason to have it dynamic was to not have empty release callback in the code. However we have empty callbacks for function and patch in the code now, so it is no longer valid and the advantage of static allocation is clear. Signed-off-by: Miroslav Benes <mbenes@suse.cz> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
-rw-r--r--include/linux/livepatch.h2
-rw-r--r--kernel/livepatch/core.c22
2 files changed, 17 insertions, 7 deletions
diff --git a/include/linux/livepatch.h b/include/linux/livepatch.h
index ee6dbb39a809..fe45f2f02c8d 100644
--- a/include/linux/livepatch.h
+++ b/include/linux/livepatch.h
@@ -99,7 +99,7 @@ struct klp_object {
struct klp_func *funcs;
/* internal */
- struct kobject *kobj;
+ struct kobject kobj;
struct module *mod;
enum klp_state state;
};
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index c03c04637ec6..e997782362c3 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -651,6 +651,15 @@ static struct kobj_type klp_ktype_patch = {
.default_attrs = klp_patch_attrs,
};
+static void klp_kobj_release_object(struct kobject *kobj)
+{
+}
+
+static struct kobj_type klp_ktype_object = {
+ .release = klp_kobj_release_object,
+ .sysfs_ops = &kobj_sysfs_ops,
+};
+
static void klp_kobj_release_func(struct kobject *kobj)
{
}
@@ -695,7 +704,7 @@ static void klp_free_objects_limited(struct klp_patch *patch,
for (obj = patch->objs; obj->funcs && obj != limit; obj++) {
klp_free_funcs_limited(obj, NULL);
- kobject_put(obj->kobj);
+ kobject_put(&obj->kobj);
}
}
@@ -713,7 +722,7 @@ static int klp_init_func(struct klp_object *obj, struct klp_func *func)
func->state = KLP_DISABLED;
return kobject_init_and_add(&func->kobj, &klp_ktype_func,
- obj->kobj, "%s", func->old_name);
+ &obj->kobj, "%s", func->old_name);
}
/* parts of the initialization that is done only when the object is loaded */
@@ -753,9 +762,10 @@ static int klp_init_object(struct klp_patch *patch, struct klp_object *obj)
klp_find_object_module(obj);
name = klp_is_module(obj) ? obj->name : "vmlinux";
- obj->kobj = kobject_create_and_add(name, &patch->kobj);
- if (!obj->kobj)
- return -ENOMEM;
+ ret = kobject_init_and_add(&obj->kobj, &klp_ktype_object,
+ &patch->kobj, "%s", name);
+ if (ret)
+ return ret;
for (func = obj->funcs; func->old_name; func++) {
ret = klp_init_func(obj, func);
@@ -773,7 +783,7 @@ static int klp_init_object(struct klp_patch *patch, struct klp_object *obj)
free:
klp_free_funcs_limited(obj, func);
- kobject_put(obj->kobj);
+ kobject_put(&obj->kobj);
return ret;
}