[PATCH 2/4] scsi: a4000t: Mark driver struct with __refdata to prevent section mismatch

From: Uwe Kleine-König
Date: Fri Mar 29 2024 - 17:12:48 EST


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/a4000t: section mismatch in reference: amiga_a4000t_scsi_driver+0x8 (section: .data) -> amiga_a4000t_scsi_remove (section: .exit.text)

that triggers on an allmodconfig W=1 build.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
---
drivers/scsi/a4000t.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/a4000t.c b/drivers/scsi/a4000t.c
index e435fc06a624..d9103adc87fe 100644
--- a/drivers/scsi/a4000t.c
+++ b/drivers/scsi/a4000t.c
@@ -108,7 +108,13 @@ static void __exit amiga_a4000t_scsi_remove(struct platform_device *pdev)
release_mem_region(res->start, resource_size(res));
}

-static struct platform_driver amiga_a4000t_scsi_driver = {
+/*
+ * amiga_a4000t_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_a4000t_scsi_driver __refdata = {
.remove_new = __exit_p(amiga_a4000t_scsi_remove),
.driver = {
.name = "amiga-a4000t-scsi",
--
2.43.0