[PATCH v4 22/41] docs: kdoc_re: fix a parse bug on struct page_pool_params

[Mauro Carvalho Chehab <mchehab+huawei@kernel.org>]

The struct page_pool_params definition has a private
definition on it:

    struct page_pool_params {
	struct_group_tagged(page_pool_params_fast, fast,
		unsigned int	order;
		unsigned int	pool_size;
		int		nid;
		struct device	*dev;
		struct napi_struct *napi;
		enum dma_data_direction dma_dir;
		unsigned int	max_len;
		unsigned int	offset;
	);
	struct_group_tagged(page_pool_params_slow, slow,
		struct net_device *netdev;
		unsigned int queue_idx;
		unsigned int	flags;
    /* private: used by test code only */
		void (*init_callback)(netmem_ref netmem, void *arg);
		void *init_arg;
	);
   };

This makes kernel-doc parser to miss the end parenthesis of
the second struct_group_tagged, causing documentation issues.

Address it by ensuring that, if are there anything at the stack,
it will be placed as the last part of the argument.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
---
 tools/lib/python/kdoc/kdoc_re.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/lib/python/kdoc/kdoc_re.py b/tools/lib/python/kdoc/kdoc_re.py
index 858cc688a58f..5f455ffff7b2 100644
--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py
@@ -201,6 +201,9 @@ class NestedMatch:
         """
 
         stack = []
+        start = 0
+        offset = 0
+        pos = 0
 
         for match_re in self.regex.finditer(line):
             start = match_re.start()
@@ -250,6 +253,11 @@ class NestedMatch:
                         yield start, offset, pos + 1
                         break
 
+        # When /* private */ is used, it may end the end delimiterq
+        if stack:
+            stack.pop()
+            yield start, offset, len(line) + 1
+
     def search(self, line):
         """
         This is similar to re.search:
-- 
2.52.0