btrfs: assert block group is locked in btrfs_use_block_group_size_class()

fdmanana · fdmanana · commit 0ffe70f1a413 · 2026-01-21T15:35:54.000Z
It's supposed to be called with the block group locked, in order to read
and set its size_class member, so assert it's locked.

Reviewed-by: Johannes Thumshirn &lt;johannes.thumshirn@wdc.com&gt;
Reviewed-by: Qu Wenruo &lt;wqu@suse.com&gt;
Signed-off-by: Filipe Manana &lt;fdmanana@suse.com&gt;
Reviewed-by: David Sterba &lt;dsterba@suse.com&gt;
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
@@ -4755,6 +4755,7 @@ int btrfs_use_block_group_size_class(struct btrfs_block_group *bg,
 				     enum btrfs_block_group_size_class size_class,
 				     bool force_wrong_size_class)
 {
+	lockdep_assert_held(&bg->lock);
 	ASSERT(size_class != BTRFS_BG_SZ_NONE);
 
 	/* The new allocation is in the right size class, do nothing */

Original file line number	Diff line number	Diff line change
`@@ -4755,6 +4755,7 @@ int btrfs_use_block_group_size_class(struct btrfs_block_group *bg,`
`4755`	`4755`	`enum btrfs_block_group_size_class size_class,`
`4756`	`4756`	`bool force_wrong_size_class)`
`4757`	`4757`	`{`
	`4758`	`+ lockdep_assert_held(&bg->lock);`
`4758`	`4759`	`ASSERT(size_class != BTRFS_BG_SZ_NONE);`
`4759`	`4760`
`4760`	`4761`	`/* The new allocation is in the right size class, do nothing */`