[PATCH 09/15] xfs: Introduce a new mutex lock for shrinkfs

[Jeff Liu]

Introduce a new mutex lock for shrinkfs which is same to growfs.


Signed-off-by: Jie Liu <jeff.liu at oracle.com>

---
 fs/xfs/xfs_mount.h |    1 +
 fs/xfs/xfs_super.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 4fe2232..9eaea5a 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -161,6 +161,7 @@ typedef struct xfs_mount {
 	struct radix_tree_root	m_perag_tree;	/* per-ag accounting info */
 	spinlock_t		m_perag_lock;	/* lock for m_perag_tree */
 	struct mutex		m_growlock;	/* growfs mutex */
+	struct mutex		m_shrinklock;	/* shrinkfs mutex */
 	int			m_fixedfsid[2];	/* unchanged for life of FS */
 	uint			m_dmevmask;	/* DMI events for this FS */
 	__uint64_t		m_flags;	/* global mount flags */
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index e01f64c..81b6b60 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1330,6 +1330,7 @@ xfs_fs_fill_super(
 
 	spin_lock_init(&mp->m_sb_lock);
 	mutex_init(&mp->m_growlock);
+	mutex_init(&mp->m_shrinklock);
 	atomic_set(&mp->m_active_trans, 0);
 
 	mp->m_super = sb;
-- 
1.7.4.1