summaryrefslogtreecommitdiff
path: root/include/linux/irqflags.h
diff options
context:
space:
mode:
authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2020-03-21 14:26:03 +0300
committerPeter Zijlstra <peterz@infradead.org>2020-03-21 18:00:24 +0300
commit49915ac35ca7b07c54295a72d905be5064afb89e (patch)
treeda7e2b9c50d6ecdfa94db8b0d409fcb1527681eb /include/linux/irqflags.h
parent40db173965c05a1d803451240ed41707d5bd978d (diff)
downloadlinux-49915ac35ca7b07c54295a72d905be5064afb89e.tar.xz
lockdep: Annotate irq_work
Mark irq_work items with IRQ_WORK_HARD_IRQ which should be invoked in hardirq context even on PREEMPT_RT. IRQ_WORK without this flag will be invoked in softirq context on PREEMPT_RT. Set ->irq_config to 1 for the IRQ_WORK items which are invoked in softirq context so lockdep knows that these can safely acquire a spinlock_t. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200321113242.643576700@linutronix.de
Diffstat (limited to 'include/linux/irqflags.h')
-rw-r--r--include/linux/irqflags.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h
index 9c17f9c827aa..f23f540e0ebb 100644
--- a/include/linux/irqflags.h
+++ b/include/linux/irqflags.h
@@ -69,6 +69,17 @@ do { \
current->irq_config = 0; \
} while (0)
+# define lockdep_irq_work_enter(__work) \
+ do { \
+ if (!(atomic_read(&__work->flags) & IRQ_WORK_HARD_IRQ))\
+ current->irq_config = 1; \
+ } while (0)
+# define lockdep_irq_work_exit(__work) \
+ do { \
+ if (!(atomic_read(&__work->flags) & IRQ_WORK_HARD_IRQ))\
+ current->irq_config = 0; \
+ } while (0)
+
#else
# define trace_hardirqs_on() do { } while (0)
# define trace_hardirqs_off() do { } while (0)
@@ -83,6 +94,8 @@ do { \
# define lockdep_softirq_exit() do { } while (0)
# define lockdep_hrtimer_enter(__hrtimer) do { } while (0)
# define lockdep_hrtimer_exit(__hrtimer) do { } while (0)
+# define lockdep_irq_work_enter(__work) do { } while (0)
+# define lockdep_irq_work_exit(__work) do { } while (0)
#endif
#if defined(CONFIG_IRQSOFF_TRACER) || \