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-rw-r--r--include/linux/irq.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 951acbdb9f84..efa514ee562f 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -35,6 +35,10 @@ enum irqchip_irq_state;
*
* Bits 0-7 are the same as the IRQF_* bits in linux/interrupt.h
*
+ * Note that the first 6 definitions are shadowed by C preprocessor definitions
+ * in include/dt-bindings/interrupt-controller/irq.h. This is not an issue, as
+ * the actual values must be the same, due to being part of the stable DT ABI.
+ *
* IRQ_TYPE_NONE - default, unspecified type
* IRQ_TYPE_EDGE_RISING - rising edge triggered
* IRQ_TYPE_EDGE_FALLING - falling edge triggered