ocfs2: Remove data locks

The meta lock now covers both meta data and data, so this just removes the
now-redundant data lock.

Combining locks saves us a round of lock mastery per inode and one less lock
to ping between nodes during read/write.

We don't lose much - since meta locks were always held before a data lock
(and at the same level) ordered writeout mode (the default) ensured that
flushing for the meta data lock also pushed out data anyways.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 0 insertions, 9 deletions

diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index 9875615..a7f0ccc 100644
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -181,17 +181,8 @@ static int ocfs2_page_mkwrite(struct vm_area_struct *vma, struct page *page)
 	 */
 	down_write(&OCFS2_I(inode)->ip_alloc_sem);
 
-	ret = ocfs2_data_lock(inode, 1);
-	if (ret < 0) {
-		mlog_errno(ret);
-		goto out_meta_unlock;
-	}
-
 	ret = __ocfs2_page_mkwrite(inode, di_bh, page);
 
-	ocfs2_data_unlock(inode, 1);
-
-out_meta_unlock:
 	up_write(&OCFS2_I(inode)->ip_alloc_sem);
 
 	brelse(di_bh);