| // SPDX-License-Identifier: GPL-2.0-only |
| #include <linux/module.h> |
| #include <linux/sched.h> /* for wake_up_process() */ |
| #include <linux/ftrace.h> |
| void my_direct_func(struct task_struct *p) |
| trace_printk("waking up %s-%d\n", p->comm, p->pid); |
| extern void my_tramp(void *); |
| " .pushsection .text, \"ax\", @progbits\n" |
| " .type my_tramp, @function\n" |
| " .size my_tramp, .-my_tramp\n" |
| static int __init ftrace_direct_init(void) |
| return register_ftrace_direct((unsigned long)wake_up_process, |
| (unsigned long)my_tramp); |
| static void __exit ftrace_direct_exit(void) |
| unregister_ftrace_direct((unsigned long)wake_up_process, |
| (unsigned long)my_tramp); |
| module_init(ftrace_direct_init); |
| module_exit(ftrace_direct_exit); |
| MODULE_AUTHOR("Steven Rostedt"); |
| MODULE_DESCRIPTION("Example use case of using register_ftrace_direct()"); |