1 files changed, 14 insertions, 1 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 4eabd419aaca..5942615be398 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1841,8 +1841,15 @@ static noinline int btrfs_ioctl_snap_create_v2(struct file *file,
                 goto free_args;
         }
 
-        if (vol_args->flags & BTRFS_SUBVOL_CREATE_ASYNC)
+        if (vol_args->flags & BTRFS_SUBVOL_CREATE_ASYNC) {
+                struct inode *inode = file_inode(file);
+                struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
+
+                btrfs_warn(fs_info,
+"SNAP_CREATE_V2 ioctl with CREATE_ASYNC is deprecated and will be removed in kernel 5.7");
+
                 ptr = &transid;
+        }
         if (vol_args->flags & BTRFS_SUBVOL_RDONLY)
                 readonly = true;
         if (vol_args->flags & BTRFS_SUBVOL_QGROUP_INHERIT) {
@@ -4191,6 +4198,9 @@ static noinline long btrfs_ioctl_start_sync(struct btrfs_root *root,
         u64 transid;
         int ret;
 
+        btrfs_warn(root->fs_info,
+        "START_SYNC ioctl is deprecated and will be removed in kernel 5.7");
+
         trans = btrfs_attach_transaction_barrier(root);
         if (IS_ERR(trans)) {
                 if (PTR_ERR(trans) != -ENOENT)
@@ -4218,6 +4228,9 @@ static noinline long btrfs_ioctl_wait_sync(struct btrfs_fs_info *fs_info,
 {
         u64 transid;
 
+        btrfs_warn(fs_info,
+                "WAIT_SYNC ioctl is deprecated and will be removed in kernel 5.7");
+
         if (argp) {
                 if (copy_from_user(&transid, argp, sizeof(transid)))
                         return -EFAULT;