Both GFS2 and OCFS2 use DLM locking, which will allow async lock requests.
Signal this support by setting FOP_ASYNC_LOCK.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
---
 fs/gfs2/file.c  | 2 ++
 fs/ocfs2/file.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 08982937b5df..b9ed2602287d 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -1586,6 +1586,7 @@ const struct file_operations gfs2_file_fops = {
 	.splice_write	= gfs2_file_splice_write,
 	.setlease	= simple_nosetlease,
 	.fallocate	= gfs2_fallocate,
+	.fop_flags	= FOP_ASYNC_LOCK,
 };
 
 const struct file_operations gfs2_dir_fops = {
@@ -1598,6 +1599,7 @@ const struct file_operations gfs2_dir_fops = {
 	.lock		= gfs2_lock,
 	.flock		= gfs2_flock,
 	.llseek		= default_llseek,
+	.fop_flags	= FOP_ASYNC_LOCK,
 };
 
 #endif /* CONFIG_GFS2_FS_LOCKING_DLM */
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index ccc57038a977..a642f1adee6a 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2793,6 +2793,7 @@ const struct file_operations ocfs2_fops = {
 	.splice_write	= iter_file_splice_write,
 	.fallocate	= ocfs2_fallocate,
 	.remap_file_range = ocfs2_remap_file_range,
+	.fop_flags	= FOP_ASYNC_LOCK,
 };
 
 WRAP_DIR_ITER(ocfs2_readdir) // FIXME!
@@ -2809,6 +2810,7 @@ const struct file_operations ocfs2_dops = {
 #endif
 	.lock		= ocfs2_lock,
 	.flock		= ocfs2_flock,
+	.fop_flags	= FOP_ASYNC_LOCK,
 };
 
 /*
-- 
2.44.0