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33 lines
715 B
33 lines
715 B
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Tracepoint definitions for s390 |
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* |
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* Copyright IBM Corp. 2015 |
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* Author(s): Martin Schwidefsky <[email protected]> |
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*/ |
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#include <linux/percpu.h> |
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#define CREATE_TRACE_POINTS |
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#include <asm/trace/diag.h> |
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EXPORT_TRACEPOINT_SYMBOL(s390_diagnose); |
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static DEFINE_PER_CPU(unsigned int, diagnose_trace_depth); |
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void notrace trace_s390_diagnose_norecursion(int diag_nr) |
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{ |
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unsigned long flags; |
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unsigned int *depth; |
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/* Avoid lockdep recursion. */ |
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if (IS_ENABLED(CONFIG_LOCKDEP)) |
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return; |
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local_irq_save(flags); |
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depth = this_cpu_ptr(&diagnose_trace_depth); |
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if (*depth == 0) { |
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(*depth)++; |
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trace_s390_diagnose(diag_nr); |
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(*depth)--; |
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} |
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local_irq_restore(flags); |
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}
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