// SPDX-License-Identifier: GPL-2.0
/*
 * Tracepoint definitions for s390
 *
 * Copyright IBM Corp. 2015
 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
 */

#include <linux/percpu.h>
#define CREATE_TRACE_POINTS
#include <asm/trace/diag.h>

EXPORT_TRACEPOINT_SYMBOL(s390_diagnose);

static DEFINE_PER_CPU(unsigned int, diagnose_trace_depth);

void notrace trace_s390_diagnose_norecursion(int diag_nr)
{
        unsigned long flags;
        unsigned int *depth;

        /* Avoid lockdep recursion. */
        if (IS_ENABLED(CONFIG_LOCKDEP))
                return;
        local_irq_save(flags);
        depth = this_cpu_ptr(&diagnose_trace_depth);
        if (*depth == 0) {
                (*depth)++;
                trace_s390_diagnose(diag_nr);
                (*depth)--;
        }
        local_irq_restore(flags);
}