linux-kernel - [PATCH AUTOSEL 4.19 36/60] genirq: Add stub for set_handle_irq() when !GENERIC_IRQ_MULTI

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Message-Id: <20201027000415.1026364-36-sashal@kernel.org>
Date:   Mon, 26 Oct 2020 20:03:51 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Zhen Lei <thunder.leizhen@...wei.com>,
        Marc Zyngier <maz@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.19 36/60] genirq: Add stub for set_handle_irq() when !GENERIC_IRQ_MULTI_HANDLER

From: Zhen Lei <thunder.leizhen@...wei.com>

[ Upstream commit ea0c80d1764449acf2f70fdb25aec33800cd0348 ]

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

diff --git a/include/linux/irq.h b/include/linux/irq.h
index a042faefb9b73..731b6cf0a56b4 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -1220,6 +1220,12 @@ 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 */
-- 
2.25.1