[PATCH] btrfs: Drop WQ_PERCPU from ordered_flags in btrfs_init_workqueues()

[Nathan Chancellor]

After commit 21c05ca88a54 ("workqueue: Add warnings and ensure one among
WQ_PERCPU or WQ_UNBOUND is present"), there is a warning from the
btrfs-qgroup-rescan workqueue at run time:

  workqueue: btrfs-qgroup-rescan uses both WQ_PERCPU and WQ_UNBOUND. Dropped WQ_PERCPU, keeping WQ_UNBOUND.

WQ_PERCPU is included in ordered_flags after commit 69635d7f4b34 ("fs:
WQ_PERCPU added to alloc_workqueue users") and WQ_UNBOUND is set in
alloc_ordered_workqueue(), which btrfs_alloc_ordered_workqueue() calls.

Drop WQ_PERCPU from ordered_flags, as alloc_ordered_workqueue() notes
that only WQ_FREEZABLE and WQ_MEM_RECLAIM are meaningful.

Fixes: 69635d7f4b34 ("fs: WQ_PERCPU added to alloc_workqueue users")
Fixes: 21c05ca88a54 ("workqueue: Add warnings and ensure one among WQ_PERCPU or WQ_UNBOUND is present")
Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
---
This should go in via the workqueue tree that adds the warning.
---
 fs/btrfs/disk-io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 8a11be02eeb9..f2a3b0705486 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1928,7 +1928,7 @@ static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info)
 {
 	u32 max_active = fs_info->thread_pool_size;
 	unsigned int flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND;
-	unsigned int ordered_flags = WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_PERCPU;
+	unsigned int ordered_flags = WQ_MEM_RECLAIM | WQ_FREEZABLE;
 
 	fs_info->workers =
 		btrfs_alloc_workqueue(fs_info, "worker", flags, max_active, 16);

---
base-commit: 21c05ca88a548ca1353cbef189c97d4f03b90692
change-id: 20260601-btrfs-fix-wq-warning-qgroup-rescan-9451da1845fb

Best regards,
--  
Cheers,
Nathan