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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/irq_work.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/irq_work.h')
-rw-r--r--include/linux/irq_work.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/irq_work.h b/include/linux/irq_work.h
index 02da997ad12c..3b752e80c017 100644
--- a/include/linux/irq_work.h
+++ b/include/linux/irq_work.h
@@ -18,6 +18,8 @@
/* Doesn't want IPI, wait for tick: */
#define IRQ_WORK_LAZY BIT(2)
+/* Run hard IRQ context, even on RT */
+#define IRQ_WORK_HARD_IRQ BIT(3)
#define IRQ_WORK_CLAIMED (IRQ_WORK_PENDING | IRQ_WORK_BUSY)