linux-kernel - [PATCH 4/4] scsi: mac_scsi: Mark driver struct with _

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Date: Fri, 29 Mar 2024 22:11:44 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: "James E.J. Bottomley" <jejb@...ux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Cc: Finn Thain <fthain@...ux-m68k.org>,
	Michael Schmitz <schmitzmic@...il.com>,
	linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] scsi: mac_scsi: Mark driver struct with __refdata to prevent section mismatch

As described in the added code comment, a reference to .exit.text is ok
for drivers registered via module_platform_driver_probe(). Make this
explicit to prevent the following section mismatch warning

	WARNING: modpost: drivers/scsi/mac_scsi: section mismatch in reference: mac_scsi_driver+0x8 (section: .data) -> mac_scsi_remove (section: .exit.text)

that triggers on an allmodconfig W=1 build.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
 drivers/scsi/mac_scsi.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/mac_scsi.c b/drivers/scsi/mac_scsi.c
index 181f16899fdc..a402c4dc4645 100644
--- a/drivers/scsi/mac_scsi.c
+++ b/drivers/scsi/mac_scsi.c
@@ -534,7 +534,13 @@ static void __exit mac_scsi_remove(struct platform_device *pdev)
 	scsi_host_put(instance);
 }
 
-static struct platform_driver mac_scsi_driver = {
+/*
+ * mac_scsi_remove() lives in .exit.text. For drivers registered via
+ * module_platform_driver_probe() this is ok because they cannot get unbound at
+ * runtime. So mark the driver struct with __refdata to prevent modpost
+ * triggering a section mismatch warning.
+ */
+static struct platform_driver mac_scsi_driver __refdata = {
 	.remove_new = __exit_p(mac_scsi_remove),
 	.driver = {
 		.name	= DRV_MODULE_NAME,
-- 
2.43.0