commit e1489b4fe6045a79a5e9c658eed65311977e230a
author Ioannis Angelakopoulos <iangelak@fb.com> Mon Jul 25 15:11:48 2022 -0700
committer David Sterba <dsterba@suse.com> Mon Sep 26 12:27:53 2022 +0200
tree 9b5bf6a075b87d0af310501af55a0af9dc161446
parent ab9a323f9ab576000795285dd7ac6afeedf29e32

btrfs: add lockdep annotations for num_writers wait event

Annotate the num_writers wait event in fs/btrfs/transaction.c with
lockdep in order to catch deadlocks involving this wait event.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Ioannis Angelakopoulos <iangelak@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/disk-io.c

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 2633137..a04b32f 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2990,6 +2990,8 @@ void btrfs_init_fs_info(struct btrfs_fs_info *fs_info)
 	mutex_init(&fs_info->zoned_data_reloc_io_lock);
 	seqlock_init(&fs_info->profiles_lock);
 
+	btrfs_lockdep_init_map(fs_info, btrfs_trans_num_writers);
+
 	INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots);
 	INIT_LIST_HEAD(&fs_info->space_info);
 	INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);