[PATCH 14/20] xfs: move the log ioend workqueue to struct xlog

[Christoph Hellwig <hch@lst.de>]

Move the workqueue used for log I/O completions from struct xfs_mount
to struct xlog to keep it self contained in the log code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/xfs/xfs_log.c      | 13 +++++++++++--
 fs/xfs/xfs_log_priv.h |  1 +
 fs/xfs/xfs_mount.h    |  1 -
 fs/xfs/xfs_super.c    | 11 +----------
 4 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 1d4480ea1725..0082a181bea7 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1531,11 +1531,19 @@ xlog_alloc_log(
 	*iclogp = log->l_iclog;			/* complete ring */
 	log->l_iclog->ic_prev = prev_iclog;	/* re-write 1st prev ptr */
 
+	log->l_ioend_workqueue = alloc_workqueue("xfs-log/%s",
+			WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_HIGHPRI, 0,
+			mp->m_fsname);
+	if (!log->l_ioend_workqueue)
+		goto out_free_iclog;
+
 	error = xlog_cil_init(log);
 	if (error)
-		goto out_free_iclog;
+		goto out_destroy_workqueue;
 	return log;
 
+out_destroy_workqueue:
+	destroy_workqueue(log->l_ioend_workqueue);
 out_free_iclog:
 	for (iclog = log->l_iclog; iclog; iclog = prev_iclog) {
 		prev_iclog = iclog->ic_next;
@@ -1732,7 +1740,7 @@ xlog_bio_end_io(
 {
 	struct xlog_in_core	*iclog = bio->bi_private;
 
-	queue_work(iclog->ic_log->l_mp->m_log_workqueue,
+	queue_work(iclog->ic_log->l_ioend_workqueue,
 		   &iclog->ic_end_io_work);
 }
 
@@ -1984,6 +1992,7 @@ xlog_dealloc_log(
 	int		i;
 
 	xlog_cil_destroy(log);
+	destroy_workqueue(log->l_ioend_workqueue);
 
 	/*
 	 * Cycle all the iclogbuf locks to make sure all log IO completion
diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h
index 062ee9c13039..e8acd4818539 100644
--- a/fs/xfs/xfs_log_priv.h
+++ b/fs/xfs/xfs_log_priv.h
@@ -354,6 +354,7 @@ struct xlog {
 	struct xfs_ail		*l_ailp;	/* AIL log is working with */
 	struct xfs_cil		*l_cilp;	/* CIL log is working with */
 	struct xfs_buftarg	*l_targ;        /* buftarg of log */
+	struct workqueue_struct	*l_ioend_workqueue; /* for I/O completions */
 	struct delayed_work	l_work;		/* background flush work */
 	uint			l_flags;
 	uint			l_quotaoffs_flag; /* XFS_DQ_*, for QUOTAOFFs */
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index c81a5cd7c228..8d188155dca3 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -198,7 +198,6 @@ typedef struct xfs_mount {
 	struct workqueue_struct	*m_unwritten_workqueue;
 	struct workqueue_struct	*m_cil_workqueue;
 	struct workqueue_struct	*m_reclaim_workqueue;
-	struct workqueue_struct	*m_log_workqueue;
 	struct workqueue_struct *m_eofblocks_workqueue;
 	struct workqueue_struct	*m_sync_workqueue;
 
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index a14d11d78bd8..7cb0d2a01c41 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -840,16 +840,10 @@ xfs_init_mount_workqueues(
 	if (!mp->m_reclaim_workqueue)
 		goto out_destroy_cil;
 
-	mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
-			WQ_MEM_RECLAIM|WQ_FREEZABLE|WQ_HIGHPRI, 0,
-			mp->m_fsname);
-	if (!mp->m_log_workqueue)
-		goto out_destroy_reclaim;
-
 	mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
 			WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
 	if (!mp->m_eofblocks_workqueue)
-		goto out_destroy_log;
+		goto out_destroy_reclaim;
 
 	mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", WQ_FREEZABLE, 0,
 					       mp->m_fsname);
@@ -860,8 +854,6 @@ xfs_init_mount_workqueues(
 
 out_destroy_eofb:
 	destroy_workqueue(mp->m_eofblocks_workqueue);
-out_destroy_log:
-	destroy_workqueue(mp->m_log_workqueue);
 out_destroy_reclaim:
 	destroy_workqueue(mp->m_reclaim_workqueue);
 out_destroy_cil:
@@ -880,7 +872,6 @@ xfs_destroy_mount_workqueues(
 {
 	destroy_workqueue(mp->m_sync_workqueue);
 	destroy_workqueue(mp->m_eofblocks_workqueue);
-	destroy_workqueue(mp->m_log_workqueue);
 	destroy_workqueue(mp->m_reclaim_workqueue);
 	destroy_workqueue(mp->m_cil_workqueue);
 	destroy_workqueue(mp->m_unwritten_workqueue);
-- 
2.20.1