linux-kernel - [PATCH 1/4] scsi: a3000: Mark driver struct with _

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Date: Fri, 29 Mar 2024 22:11:41 +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: linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] scsi: a3000: 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/a3000: section mismatch in reference: amiga_a3000_scsi_driver+0x8 (section: .data) -> amiga_a3000_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/a3000.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/a3000.c b/drivers/scsi/a3000.c
index 378906f77909..ad39797890e5 100644
--- a/drivers/scsi/a3000.c
+++ b/drivers/scsi/a3000.c
@@ -295,7 +295,13 @@ static void __exit amiga_a3000_scsi_remove(struct platform_device *pdev)
 	release_mem_region(res->start, resource_size(res));
 }
 
-static struct platform_driver amiga_a3000_scsi_driver = {
+/*
+ * amiga_a3000_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 amiga_a3000_scsi_driver __refdata = {
 	.remove_new = __exit_p(amiga_a3000_scsi_remove),
 	.driver   = {
 		.name	= "amiga-a3000-scsi",
-- 
2.43.0