1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Tracepoint definitions for s390
 4 *
 5 * Copyright IBM Corp. 2015
 6 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
 7 */
 8
 9#include <linux/percpu.h>
10#define CREATE_TRACE_POINTS
11#include <asm/trace/diag.h>
12
13EXPORT_TRACEPOINT_SYMBOL(s390_diagnose);
14
15static DEFINE_PER_CPU(unsigned int, diagnose_trace_depth);
16
17void notrace trace_s390_diagnose_norecursion(int diag_nr)
18{
19	unsigned long flags;
20	unsigned int *depth;
21
22	/* Avoid lockdep recursion. */
23	if (IS_ENABLED(CONFIG_LOCKDEP))
24		return;
25	local_irq_save(flags);
26	depth = this_cpu_ptr(&diagnose_trace_depth);
27	if (*depth == 0) {
28		(*depth)++;
29		trace_s390_diagnose(diag_nr);
30		(*depth)--;
31	}
32	local_irq_restore(flags);
33}

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Tracepoint definitions for s390
 4 *
 5 * Copyright IBM Corp. 2015
 6 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
 7 */
 8
 9#include <linux/percpu.h>
10#define CREATE_TRACE_POINTS
11#include <asm/trace/diag.h>
12
13EXPORT_TRACEPOINT_SYMBOL(s390_diagnose);
14
15static DEFINE_PER_CPU(unsigned int, diagnose_trace_depth);
16
17void notrace trace_s390_diagnose_norecursion(int diag_nr)
18{
19	unsigned long flags;
20	unsigned int *depth;
21
22	/* Avoid lockdep recursion. */
23	if (IS_ENABLED(CONFIG_LOCKDEP))
24		return;
25	local_irq_save(flags);
26	depth = this_cpu_ptr(&diagnose_trace_depth);
27	if (*depth == 0) {
28		(*depth)++;
29		trace_s390_diagnose(diag_nr);
30		(*depth)--;
31	}
32	local_irq_restore(flags);
33}