1b59562d3a
Replace the indirection through struct stack_trace by using the storage array based interfaces. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Alexander Potapenko <glider@google.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: linux-mm@kvack.org Cc: David Rientjes <rientjes@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: kasan-dev@googlegroups.com Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Akinobu Mita <akinobu.mita@gmail.com> Cc: Christoph Hellwig <hch@lst.de> Cc: iommu@lists.linux-foundation.org Cc: Robin Murphy <robin.murphy@arm.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Johannes Thumshirn <jthumshirn@suse.de> Cc: David Sterba <dsterba@suse.com> Cc: Chris Mason <clm@fb.com> Cc: Josef Bacik <josef@toxicpanda.com> Cc: linux-btrfs@vger.kernel.org Cc: dm-devel@redhat.com Cc: Mike Snitzer <snitzer@redhat.com> Cc: Alasdair Kergon <agk@redhat.com> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: intel-gfx@lists.freedesktop.org Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: dri-devel@lists.freedesktop.org Cc: David Airlie <airlied@linux.ie> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Tom Zanussi <tom.zanussi@linux.intel.com> Cc: Miroslav Benes <mbenes@suse.cz> Cc: linux-arch@vger.kernel.org Link: https://lkml.kernel.org/r/20190425094801.501919093@linutronix.de
87 lines
2 KiB
C
87 lines
2 KiB
C
/*
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* Simple stack backtrace regression test module
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*
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* (C) Copyright 2008 Intel Corporation
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* Author: Arjan van de Ven <arjan@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; version 2
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* of the License.
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*/
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#include <linux/completion.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/stacktrace.h>
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static void backtrace_test_normal(void)
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{
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pr_info("Testing a backtrace from process context.\n");
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pr_info("The following trace is a kernel self test and not a bug!\n");
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dump_stack();
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}
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static DECLARE_COMPLETION(backtrace_work);
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static void backtrace_test_irq_callback(unsigned long data)
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{
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dump_stack();
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complete(&backtrace_work);
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}
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static DECLARE_TASKLET(backtrace_tasklet, &backtrace_test_irq_callback, 0);
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static void backtrace_test_irq(void)
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{
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pr_info("Testing a backtrace from irq context.\n");
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pr_info("The following trace is a kernel self test and not a bug!\n");
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init_completion(&backtrace_work);
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tasklet_schedule(&backtrace_tasklet);
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wait_for_completion(&backtrace_work);
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}
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#ifdef CONFIG_STACKTRACE
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static void backtrace_test_saved(void)
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{
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unsigned long entries[8];
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unsigned int nr_entries;
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pr_info("Testing a saved backtrace.\n");
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pr_info("The following trace is a kernel self test and not a bug!\n");
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nr_entries = stack_trace_save(entries, ARRAY_SIZE(entries), 0);
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stack_trace_print(entries, nr_entries, 0);
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}
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#else
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static void backtrace_test_saved(void)
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{
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pr_info("Saved backtrace test skipped.\n");
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}
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#endif
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static int backtrace_regression_test(void)
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{
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pr_info("====[ backtrace testing ]===========\n");
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backtrace_test_normal();
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backtrace_test_irq();
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backtrace_test_saved();
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pr_info("====[ end of backtrace testing ]====\n");
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return 0;
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}
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static void exitf(void)
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{
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}
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module_init(backtrace_regression_test);
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module_exit(exitf);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Arjan van de Ven <arjan@linux.intel.com>");
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