btrfs: tests: use standard error message after root allocation failure

Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/tests/extent-buffer-tests.c

@@ -36,7 +36,7 @@ static int test_btrfs_split_item(u32 sectorsize, u32 nodesize)
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
-		test_err("could not allocate root");
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = PTR_ERR(root);
 		goto out;
 	}

fs/btrfs/tests/free-space-tests.c

@@ -854,6 +854,7 @@ int btrfs_test_free_space_cache(u32 sectorsize, u32 nodesize)
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = PTR_ERR(root);
 		goto out;
 	}

fs/btrfs/tests/free-space-tree-tests.c

@@ -451,7 +451,7 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
-		test_err("couldn't allocate dummy root");
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = PTR_ERR(root);
 		goto out;
 	}

fs/btrfs/tests/inode-tests.c

@@ -244,7 +244,7 @@ static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
-		test_err("couldn't allocate root");
+		test_std_err(TEST_ALLOC_ROOT);
 		goto out;
 	}
 
@@ -845,7 +845,7 @@ static int test_hole_first(u32 sectorsize, u32 nodesize)
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
-		test_err("couldn't allocate root");
+		test_std_err(TEST_ALLOC_ROOT);
 		goto out;
 	}
 
@@ -941,7 +941,7 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
-		test_err("couldn't allocate root");
+		test_std_err(TEST_ALLOC_ROOT);
 		goto out;
 	}
 

fs/btrfs/tests/qgroup-tests.c

@@ -463,7 +463,7 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
-		test_err("couldn't allocate root");
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = PTR_ERR(root);
 		goto out;
 	}
@@ -495,7 +495,7 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
 
 	tmp_root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(tmp_root)) {
-		test_err("couldn't allocate a fs root");
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = PTR_ERR(tmp_root);
 		goto out;
 	}
@@ -510,7 +510,7 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
 
 	tmp_root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(tmp_root)) {
-		test_err("couldn't allocate a fs root");
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = PTR_ERR(tmp_root);
 		goto out;
 	}