| /* | |
| * 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); | |
| } |