A longstanding issue with genksyms is that it has hidden syntax errors.
When a syntax error occurs, yyerror() is called. However,
error_with_pos() is a no-op unless the -w option is provided.
You can observe syntax errors by manually passing the -w option.
For example, with CONFIG_MODVERSIONS=y on v6.13-rc1:
$ make -s KCFLAGS=-D__GENKSYMS__ kernel/module/main.i
$ cat kernel/module/main.i | scripts/genksyms/genksyms -w
[ snip ]
kernel/module/main.c:97: syntax error
The syntax error occurs in the following code in kernel/module/main.c:
static void __mod_update_bounds(enum mod_mem_type type __maybe_unused, void *base,
unsigned int size, struct mod_tree_root *tree)
{
[ snip ]
}
The issue arises from __maybe_unused, which is defined as
__attribute__((__unused__)).
This commit allows direct_abstract_declarator to be followed with
attributes.
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
---
scripts/genksyms/parse.y | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/scripts/genksyms/parse.y b/scripts/genksyms/parse.y
index 49d3e536b9a8..82774df50642 100644
--- a/scripts/genksyms/parse.y
+++ b/scripts/genksyms/parse.y
@@ -383,8 +383,8 @@ abstract_declarator:
ptr_operator
| ptr_operator abstract_declarator
{ $$ = $2 ? $2 : $1; }
- | direct_abstract_declarator
- { $$ = $1; dont_want_type_specifier = false; }
+ | direct_abstract_declarator attribute_opt
+ { $$ = $2; dont_want_type_specifier = false; }
;
direct_abstract_declarator:
--
2.43.0
