[tip: irq/core] genirq: Add stub for set_handle_irq() when !GENERIC_IRQ_MULTI_HANDLER

[tip-bot2 for Zhen Lei]

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     ea0c80d1764449acf2f70fdb25aec33800cd0348
Gitweb:        https://git.kernel.org/tip/ea0c80d1764449acf2f70fdb25aec33800cd0348
Author:        Zhen Lei <thunder.leizhen@xxxxxxxxxx>
AuthorDate:    Thu, 24 Sep 2020 15:17:49 +08:00
Committer:     Marc Zyngier <maz@xxxxxxxxxx>
CommitterDate: Fri, 25 Sep 2020 16:33:57 +01:00

genirq: Add stub for set_handle_irq() when !GENERIC_IRQ_MULTI_HANDLER

In order to avoid compilation errors when a driver references set_handle_irq(),
but that the architecture doesn't select GENERIC_IRQ_MULTI_HANDLER,
add a stub function that will just WARN_ON_ONCE() if ever used.

Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
[maz: commit message]
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20200924071754.4509-2-thunder.leizhen@xxxxxxxxxx
---
 include/linux/irq.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 1b7f4df..b167bae 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -1252,6 +1252,12 @@ int __init set_handle_irq(void (*handle_irq)(struct pt_regs *));
  * top-level IRQ handler.
  */
 extern void (*handle_arch_irq)(struct pt_regs *) __ro_after_init;
+#else
+#define set_handle_irq(handle_irq)		\
+	do {					\
+		(void)handle_irq;		\
+		WARN_ON(1);			\
+	} while (0)
 #endif
 
 #endif /* _LINUX_IRQ_H */