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b5a6b71b MS |
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 | ||
230ccb37 | 12 | EXPORT_TRACEPOINT_SYMBOL(s390_diagnose); |
b5a6b71b MS |
13 | |
14 | static DEFINE_PER_CPU(unsigned int, diagnose_trace_depth); | |
15 | ||
230ccb37 | 16 | void trace_s390_diagnose_norecursion(int diag_nr) |
b5a6b71b MS |
17 | { |
18 | unsigned long flags; | |
19 | unsigned int *depth; | |
20 | ||
21 | local_irq_save(flags); | |
22 | depth = this_cpu_ptr(&diagnose_trace_depth); | |
23 | if (*depth == 0) { | |
24 | (*depth)++; | |
230ccb37 | 25 | trace_s390_diagnose(diag_nr); |
b5a6b71b MS |
26 | (*depth)--; |
27 | } | |
28 | local_irq_restore(flags); | |
29 | } |