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lockdep: Refactor IRQ trace events fields into struct

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Refactor the IRQ trace events fields, used for printing information
about the IRQ trace events, into a separate struct 'irqtrace_events'.

This improves readability by separating the information only used in
reporting, as well as enables (simplified) storing/restoring of
irqtrace_events snapshots.

No functional change intended.

Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200729110916.3920464-1-elver@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Marco Elver
2020-07-29 13:09:15 +02:00
committed by Ingo Molnar
parent 859247d39f
commit 0584df9c12
4 changed files with 50 additions and 48 deletions
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16
kernel/fork.c
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@@ -2035,17 +2035,11 @@ static __latent_entropy struct task_struct *copy_process(
seqcount_init(&p->mems_allowed_seq);
#endif
#ifdef CONFIG_TRACE_IRQFLAGS
p->irq_events = 0;
p->hardirq_enable_ip = 0;
p->hardirq_enable_event = 0;
p->hardirq_disable_ip = _THIS_IP_;
p->hardirq_disable_event = 0;
p->softirqs_enabled = 1;
p->softirq_enable_ip = _THIS_IP_;
p->softirq_enable_event = 0;
p->softirq_disable_ip = 0;
p->softirq_disable_event = 0;
p->softirq_context = 0;
memset(&p->irqtrace, 0, sizeof(p->irqtrace));
p->irqtrace.hardirq_disable_ip = _THIS_IP_;
p->irqtrace.softirq_enable_ip = _THIS_IP_;
p->softirqs_enabled = 1;
p->softirq_context = 0;
#endif
p->pagefault_disabled = 0;