livepatch: create temporary klp_update_patch_state() stub

Create temporary stubs for klp_update_patch_state() so we can add
TIF_PATCH_PENDING to different architectures in separate patches without
breaking build bisectability.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

2 files changed, 7 insertions, 1 deletions

diff --git a/include/linux/livepatch.h b/include/linux/livepatch.h
index 9072f04db616..5cc20e588a22 100644
--- a/include/linux/livepatch.h
+++ b/include/linux/livepatch.h
@@ -123,10 +123,13 @@ void arch_klp_init_object_loaded(struct klp_patch *patch,
 int klp_module_coming(struct module *mod);
 void klp_module_going(struct module *mod);
 
+void klp_update_patch_state(struct task_struct *task);
+
 #else /* !CONFIG_LIVEPATCH */
 
 static inline int klp_module_coming(struct module *mod) { return 0; }
-static inline void klp_module_going(struct module *mod) { }
+static inline void klp_module_going(struct module *mod) {}
+static inline void klp_update_patch_state(struct task_struct *task) {}
 
 #endif /* CONFIG_LIVEPATCH */
 
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index af4643873e71..217b39d71176 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -64,6 +64,9 @@ static LIST_HEAD(klp_ops);
 
 static struct kobject *klp_root_kobj;
 
+/* TODO: temporary stub */
+void klp_update_patch_state(struct task_struct *task) {}
+
 static struct klp_ops *klp_find_ops(unsigned long old_addr)
 {
         struct klp_ops *ops;