[RFC] net: ethernet: mtk_wed: annotate RCU release in attach()

Commit Message

Johannes Berg March 31, 2025, 10:07 a.m. UTC

From: Johannes Berg <[e-mail]>

There are some sparse warnings in wifi, and it seems that
it's actually possible to annotate a function pointer with
__releases(), making the sparse warnings go away. In a way
that also serves as documentation that rcu_read_unlock()
must be called in the attach method, so add that annotation.

Signed-off-by: Johannes Berg <[e-mail]>
---
 include/linux/soc/mediatek/mtk_wed.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/include/linux/soc/mediatek/mtk_wed.h b/include/linux/soc/mediatek/mtk_wed.h
index a476648858a6..d8949a4ed0dc 100644
--- a/include/linux/soc/mediatek/mtk_wed.h
+++ b/include/linux/soc/mediatek/mtk_wed.h
@@ -192,7 +192,7 @@  struct mtk_wed_device {
 };
 
 struct mtk_wed_ops {
-	int (*attach)(struct mtk_wed_device *dev);
+	int (*attach)(struct mtk_wed_device *dev) __releases(RCU);
 	int (*tx_ring_setup)(struct mtk_wed_device *dev, int ring,
 			     void __iomem *regs, bool reset);
 	int (*rx_ring_setup)(struct mtk_wed_device *dev, int ring,