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