// 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 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); }