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[v2,2/4] blk-zoned: Document locking assumptions

Message ID 20241217210310.645966-3-bvanassche@acm.org (mailing list archive)
State New
Headers show
Series Minor improvements for the zoned block storage code | expand

Commit Message

Bart Van Assche Dec. 17, 2024, 9:03 p.m. UTC 
Document which functions expect that their callers must hold a lock.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 block/blk-zoned.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 1575b887fa38..954724a2e3c6 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -459,6 +459,8 @@  static inline void disk_put_zone_wplug(struct blk_zone_wplug *zwplug)
 static inline bool disk_should_remove_zone_wplug(struct gendisk *disk,
 						 struct blk_zone_wplug *zwplug)
 {
+	lockdep_assert_held(&zwplug->lock);
+
 	/* If the zone write plug was already removed, we are done. */
 	if (zwplug->flags & BLK_ZONE_WPLUG_UNHASHED)
 		return false;
@@ -913,6 +915,8 @@  static bool blk_zone_wplug_prepare_bio(struct blk_zone_wplug *zwplug,
 {
 	struct gendisk *disk = bio->bi_bdev->bd_disk;
 
+	lockdep_assert_held(&zwplug->lock);
+
 	/*
 	 * If we lost track of the zone write pointer due to a write error,
 	 * the user must either execute a report zones, reset the zone or finish