Simple livepatch to make all livepatches to "stay in transition" (well not really, just mocking the transition_show function) forever.

patch.c

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/livepatch.h>

static ssize_t my_transition_show(struct kobject *kobj,
                               struct kobj_attribute *attr, char *buf)
{
        return snprintf(buf, PAGE_SIZE-1, "%d\n", 1);
}

static struct klp_func funcs[] = {
        {
                .old_name = "transition_show",
                .new_func = my_transition_show,
        }, { }
};

static struct klp_object objs[] = {
        {
                .funcs = funcs,
        }, { }
};

static struct klp_patch patch = {
        .mod = THIS_MODULE,
        .objs = objs,
};

static int livepatch_init(void)
{
        return klp_enable_patch(&patch);

}

static void livepatch_exit(void)
{
}

module_init(livepatch_init);
module_exit(livepatch_exit);
MODULE_LICENSE("GPL");
MODULE_INFO(livepatch, "Y");