| * DEBUG_PREEMPT variant of smp_processor_id(). |
| #include <linux/export.h> |
| #include <linux/kallsyms.h> |
| notrace static unsigned int check_preemption_disabled(const char *what1, |
| int this_cpu = raw_smp_processor_id(); |
| if (likely(preempt_count())) |
| * Kernel threads bound to a single CPU can safely use |
| if (cpumask_equal(tsk_cpus_allowed(current), cpumask_of(this_cpu))) |
| * It is valid to assume CPU-locality during early bootup: |
| if (system_state != SYSTEM_RUNNING) |
| preempt_disable_notrace(); |
| printk(KERN_ERR "BUG: using %s%s() in preemptible [%08x] code: %s/%d\n", |
| what1, what2, preempt_count() - 1, current->comm, current->pid); |
| print_symbol("caller is %s\n", (long)__builtin_return_address(0)); |
| preempt_enable_no_resched_notrace(); |
| notrace unsigned int debug_smp_processor_id(void) |
| return check_preemption_disabled("smp_processor_id", ""); |
| EXPORT_SYMBOL(debug_smp_processor_id); |
| notrace void __this_cpu_preempt_check(const char *op) |
| check_preemption_disabled("__this_cpu_", op); |
| EXPORT_SYMBOL(__this_cpu_preempt_check); |