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

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

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

@@ -43,7 +43,7 @@ static int test_btrfs_split_item(u32 sectorsize, u32 nodesize)
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		test_err("could not allocate path");
+		test_std_err(TEST_ALLOC_PATH);
 		ret = -ENOMEM;
 		goto out;
 	}

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

@@ -486,7 +486,7 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		test_err("couldn't allocate path");
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = -ENOMEM;
 		goto out;
 	}

fs/btrfs/tests/qgroup-tests.c

@@ -32,7 +32,7 @@ static int insert_normal_tree_ref(struct btrfs_root *root, u64 bytenr,
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		test_err("couldn't allocate path");
+		test_std_err(TEST_ALLOC_ROOT);
 		return -ENOMEM;
 	}
 
@@ -82,7 +82,7 @@ static int add_tree_ref(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		test_err("couldn't allocate path");
+		test_std_err(TEST_ALLOC_ROOT);
 		return -ENOMEM;
 	}
 
@@ -132,7 +132,7 @@ static int remove_extent_item(struct btrfs_root *root, u64 bytenr,
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		test_err("couldn't allocate path");
+		test_std_err(TEST_ALLOC_ROOT);
 		return -ENOMEM;
 	}
 	path->leave_spinning = 1;
@@ -166,7 +166,7 @@ static int remove_extent_ref(struct btrfs_root *root, u64 bytenr,
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		test_err("couldn't allocate path");
+		test_std_err(TEST_ALLOC_ROOT);
 		return -ENOMEM;
 	}