On Thu, 28 Jun 2018 11:21:47 -0700 Joel Fernandes joel@joelfernandes.org wrote:
diff --git a/kernel/trace/trace_preemptirq.c b/kernel/trace/trace_preemptirq.c new file mode 100644 index 000000000000..dc01c7f4d326 --- /dev/null +++ b/kernel/trace/trace_preemptirq.c @@ -0,0 +1,71 @@
Can you send a patch on top of this, that adds a SPDX header here. Just add another patch, no need to resend this one.
I need to go through all the files in kernel/trace/* and add SPDX headers. I don't want to add more files that don't have them.
I'm still playing around with this patch, and testing it.
-- Steve
+/*
- preemptoff and irqoff tracepoints
- Copyright (C) Joel Fernandes (Google) joel@joelfernandes.org
- */
+#include <linux/kallsyms.h> +#include <linux/uaccess.h> +#include <linux/module.h> +#include <linux/ftrace.h>
+#define CREATE_TRACE_POINTS +#include <trace/events/preemptirq.h>
+#ifdef CONFIG_TRACE_IRQFLAGS +/* Per-cpu variable to prevent redundant calls when IRQs already off */ +static DEFINE_PER_CPU(int, tracing_irq_cpu);
+void trace_hardirqs_on(void) +{
- if (lockdep_recursing(current) || !this_cpu_read(tracing_irq_cpu))
return;- trace_irq_enable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
- this_cpu_write(tracing_irq_cpu, 0);
+} +EXPORT_SYMBOL(trace_hardirqs_on);
+void trace_hardirqs_off(void) +{
- if (lockdep_recursing(current) || this_cpu_read(tracing_irq_cpu))
return;- this_cpu_write(tracing_irq_cpu, 1);
- trace_irq_disable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
+} +EXPORT_SYMBOL(trace_hardirqs_off);
+__visible void trace_hardirqs_on_caller(unsigned long caller_addr) +{
- if (lockdep_recursing(current) || !this_cpu_read(tracing_irq_cpu))
return;- trace_irq_enable_rcuidle(CALLER_ADDR0, caller_addr);
- this_cpu_write(tracing_irq_cpu, 0);
+} +EXPORT_SYMBOL(trace_hardirqs_on_caller);
+__visible void trace_hardirqs_off_caller(unsigned long caller_addr) +{
- if (lockdep_recursing(current) || this_cpu_read(tracing_irq_cpu))
return;- this_cpu_write(tracing_irq_cpu, 1);
- trace_irq_disable_rcuidle(CALLER_ADDR0, caller_addr);
+} +EXPORT_SYMBOL(trace_hardirqs_off_caller); +#endif /* CONFIG_TRACE_IRQFLAGS */
+#ifdef CONFIG_TRACE_PREEMPT_TOGGLE
+void trace_preempt_on(unsigned long a0, unsigned long a1) +{
- trace_preempt_enable_rcuidle(a0, a1);
+}
+void trace_preempt_off(unsigned long a0, unsigned long a1) +{
- trace_preempt_disable_rcuidle(a0, a1);
+} +#endif
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