The attribute is only modified during __init phase.
Protect it against accidental or intentional modifications afterwards.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
---
 drivers/acpi/bgrt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/bgrt.c b/drivers/acpi/bgrt.c
index d1d9c9289087a1ca6b36e8497cb104bad3282737..88837c291a7630416f0ae3854d6d1a733a590961 100644
--- a/drivers/acpi/bgrt.c
+++ b/drivers/acpi/bgrt.c
@@ -29,7 +29,7 @@ BGRT_SHOW(type, image_type);
 BGRT_SHOW(xoffset, image_offset_x);
 BGRT_SHOW(yoffset, image_offset_y);
 
-static BIN_ATTR_SIMPLE_RO(image);
+static __ro_after_init BIN_ATTR_SIMPLE_RO(image);
 
 static struct attribute *bgrt_attributes[] = {
 	&bgrt_attr_version.attr,

-- 
2.47.1