linux-kernel - [PATCH] arm: make sa1111_bus

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Message-ID: <20250918134429.270814-1-abarnas@google.com>
Date: Thu, 18 Sep 2025 13:44:28 +0000
From: "Adrian Barnaś" <abarnas@...gle.com>
To: Russell King <linux@...linux.org.uk>, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	"Adrian Barnaś" <abarnas@...gle.com>
Subject: [PATCH] arm: make sa1111_bus_type const

Because driver core can properly handle constant struct bus_type,
move the sa1111_bus_type to be a constant structure as well,
placing it into read-only memory which can not be modified at runtime.

Signed-off-by: Adrian Barnaś <abarnas@...gle.com>
---
 arch/arm/common/sa1111.c               | 2 +-
 arch/arm/include/asm/hardware/sa1111.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c
index 3389a70e4d49..04ff75dcc20e 100644
--- a/arch/arm/common/sa1111.c
+++ b/arch/arm/common/sa1111.c
@@ -1371,7 +1371,7 @@ static void sa1111_bus_remove(struct device *dev)
 		drv->remove(sadev);
 }
 
-struct bus_type sa1111_bus_type = {
+const struct bus_type sa1111_bus_type = {
 	.name		= "sa1111-rab",
 	.match		= sa1111_match,
 	.probe		= sa1111_bus_probe,
diff --git a/arch/arm/include/asm/hardware/sa1111.h b/arch/arm/include/asm/hardware/sa1111.h
index a815f39b4243..90b6a832108d 100644
--- a/arch/arm/include/asm/hardware/sa1111.h
+++ b/arch/arm/include/asm/hardware/sa1111.h
@@ -368,7 +368,7 @@
 
 
 
-extern struct bus_type sa1111_bus_type;
+extern const struct bus_type sa1111_bus_type;
 
 #define SA1111_DEVID_SBI	(1 << 0)
 #define SA1111_DEVID_SK		(1 << 1)
-- 
2.51.0.470.ga7dc726c21-goog