[PATCH] OSS: dmasound/paula: Mark driver struct with __refdata to prevent section mismatch

Uwe Kleine-König
2024-03-29T21:54:57Z

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: sound/oss/dmasound/dmasound_paula: section mismatch in reference: amiga_audio_driver+0x8 (section: .data) -> amiga_audio_remove (section: .exit.text)

that triggers on an allmodconfig W=1 build.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
sound/oss/dmasound/dmasound_paula.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sound/oss/dmasound/dmasound_paula.c b/sound/oss/dmasound/dmasound_paula.c
index 0ba8f0c4cd99..3a593da09280 100644
--- a/sound/oss/dmasound/dmasound_paula.c
+++ b/sound/oss/dmasound/dmasound_paula.c
@@ -725,7 +725,13 @@ static void __exit amiga_audio_remove(struct platform_device *pdev)
dmasound_deinit();
}

-static struct platform_driver amiga_audio_driver = {
+/*
+ * amiga_audio_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_audio_driver __refdata = {
.remove_new = __exit_p(amiga_audio_remove),
.driver = {
.name = "amiga-audio",
base-commit: a6bd6c9333397f5a0e2667d4d82fef8c970108f2
--
2.43.0