[RFC PATCH v2 08/18] livepatch: temporary stubs for klp_patch_pending() and klp_patch_task()

Josh Poimboeuf
2016-04-28T20:45:25Z

Create temporary stubs for klp_patch_pending() and klp_patch_task() 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>
---
include/linux/livepatch.h | 7 ++++++-
kernel/livepatch/core.c | 3 +++
2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/include/linux/livepatch.h b/include/linux/livepatch.h
index 0933ca4..a8c6c9c 100644
--- a/include/linux/livepatch.h
+++ b/include/linux/livepatch.h
@@ -118,10 +118,15 @@ int klp_disable_patch(struct klp_patch *);
int klp_module_coming(struct module *mod);
void klp_module_going(struct module *mod);

+static inline bool klp_patch_pending(struct task_struct *task) { return false; }
+void klp_patch_task(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 bool klp_patch_pending(struct task_struct *task) { return false; }
+static inline void klp_patch_task(struct task_struct *task) {}

#endif /* CONFIG_LIVEPATCH */

diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index a19f195..6ea6880 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_patch_task(struct task_struct *task) {}
+
static struct klp_ops *klp_find_ops(unsigned long old_addr)
{
struct klp_ops *ops;
--
2.4.11