1 files changed, 3 insertions, 0 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index ccfa81f33bb0..48ae98819d35 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -922,6 +922,9 @@ struct ext4_inode_info {
 #define EXT4_MOUNT_DISCARD              0x40000000 /* Issue DISCARD requests */
 #define EXT4_MOUNT_INIT_INODE_TABLE     0x80000000 /* Initialize uninitialized itables */
 
+#define EXT4_MOUNT2_EXPLICIT_DELALLOC   0x00000001 /* User explicitly
+                                                      specified delalloc */
+
 #define clear_opt(sb, opt)              EXT4_SB(sb)->s_mount_opt &= \
                                                 ~EXT4_MOUNT_##opt
 #define set_opt(sb, opt)                EXT4_SB(sb)->s_mount_opt |= \