diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index a6c04a5..c9c3807 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -988,7 +988,7 @@
 		goto err_free_p;
 
 	p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
-	if (p->o_arg.seqid == NULL)
+	if (IS_ERR(p->o_arg.seqid))
 		goto err_free_label;
 	nfs_sb_active(dentry->d_sb);
 	p->dentry = dget(dentry);
@@ -2779,7 +2779,7 @@
 	calldata->arg.fh = NFS_FH(state->inode);
 	/* Serialization for the sequence id */
 	calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
-	if (calldata->arg.seqid == NULL)
+	if (IS_ERR(calldata->arg.seqid))
 		goto out_free_calldata;
 	calldata->arg.fmode = 0;
 	calldata->arg.bitmask = server->cache_consistency_bitmask;
@@ -5517,7 +5517,7 @@
 		goto out;
 	seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
 	status = -ENOMEM;
-	if (seqid == NULL)
+	if (IS_ERR(seqid))
 		goto out;
 	task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
 	status = PTR_ERR(task);
@@ -5558,10 +5558,10 @@
 	p->arg.fh = NFS_FH(inode);
 	p->arg.fl = &p->fl;
 	p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
-	if (p->arg.open_seqid == NULL)
+	if (IS_ERR(p->arg.open_seqid))
 		goto out_free;
 	p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
-	if (p->arg.lock_seqid == NULL)
+	if (IS_ERR(p->arg.lock_seqid))
 		goto out_free_seqid;
 	p->arg.lock_stateid = &lsp->ls_stateid;
 	p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;