1/*
 2 * Tracepoint definitions for s390
 3 *
 4 * Copyright IBM Corp. 2015
 5 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
 6 */
 7
 8#include <linux/percpu.h>
 9#define CREATE_TRACE_POINTS
10#include <asm/trace/diag.h>
11
12EXPORT_TRACEPOINT_SYMBOL(s390_diagnose);
13
14static DEFINE_PER_CPU(unsigned int, diagnose_trace_depth);
15
16void trace_s390_diagnose_norecursion(int diag_nr)
17{
18	unsigned long flags;
19	unsigned int *depth;
20
21	/* Avoid lockdep recursion. */
22	if (IS_ENABLED(CONFIG_LOCKDEP))
23		return;
24	local_irq_save(flags);
25	depth = this_cpu_ptr(&diagnose_trace_depth);
26	if (*depth == 0) {
27		(*depth)++;
28		trace_s390_diagnose(diag_nr);
29		(*depth)--;
30	}
31	local_irq_restore(flags);
32}