docs: kdoc: trim __cacheline_group_* with the other annotations

The special case for __cacheline_group_begin/end() can be handled by just
adding another pattern to the struct_prefixes, eliminating the need for a
special case in push_parameter().

One change is that these annotations no longer appear in the rendered
output, just like all the other annotations that we clean out.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>

scripts/lib/kdoc/kdoc_parser.py

@@ -90,6 +90,7 @@ struct_prefixes = [
     (KernRe(r'\s*CRYPTO_MINALIGN_ATTR', re.S), ' '),
     (KernRe(r'\s*____cacheline_aligned_in_smp', re.S), ' '),
     (KernRe(r'\s*____cacheline_aligned', re.S), ' '),
+    (KernRe(r'\s*__cacheline_group_(begin|end)\([^\)]+\);'), ''),
     #
     # Unwrap struct_group macros based on this definition:
     # __struct_group(TAG, NAME, ATTRS, MEMBERS...)
@@ -447,12 +448,6 @@ class KernelDoc:
             self.entry.parameterdescs[param] = "anonymous\n"
             self.entry.anon_struct_union = True
 
-        # Handle cache group enforcing variables: they do not need
-        # to be described in header files
-        elif "__cacheline_group" in param:
-            # Ignore __cacheline_group_begin and __cacheline_group_end
-            return
-
         # Warn if parameter has no description
         # (but ignore ones starting with # as these are not parameters
         # but inline preprocessor statements)