From 5f8e4007c10d8f7a0f28be8a7894eb7712d0b111 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Thu, 11 Apr 2024 11:32:08 +0200 Subject: [PATCH] kernel-doc: fix struct_group_tagged() parsing kernel-doc emits a warning on struct_group_tagged() if you describe your struct group member: include/net/libeth/rx.h:69: warning: Excess struct member 'fp' description in 'libeth_fq' The code: /** * struct libeth_fq - structure representing a buffer queue * @fp: hotpath part of the structure * @pp: &page_pool for buffer management [...] */ struct libeth_fq { struct_group_tagged(libeth_fq_fp, fp, struct page_pool *pp; [...] ); When a struct_group_tagged() is encountered, we need to build a `struct TAG NAME;` from it, so that it will be treated as a valid embedded struct. Decouple the regex and do the replacement there. As far as I can see, this doesn't produce any new warnings on the current mainline tree. Reported-by: Jakub Kicinski Closes: https://lore.kernel.org/netdev/20240405212513.0d189968@kernel.org Fixes: 50d7bd38c3aa ("stddef: Introduce struct_group() helper macro") Signed-off-by: Kees Cook Co-developed-by: Alexander Lobakin Signed-off-by: Alexander Lobakin Reviewed-by: Przemek Kitszel Signed-off-by: Jonathan Corbet Link: https://lore.kernel.org/r/20240411093208.2483580-1-aleksander.lobakin@intel.com --- scripts/kernel-doc | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/scripts/kernel-doc b/scripts/kernel-doc index cb1be22afc65..438dfe76b989 100755 --- a/scripts/kernel-doc +++ b/scripts/kernel-doc @@ -1151,7 +1151,8 @@ sub dump_struct($$) { # - first eat non-declaration parameters and rewrite for final match # - then remove macro, outer parens, and trailing semicolon $members =~ s/\bstruct_group\s*\(([^,]*,)/STRUCT_GROUP(/gos; - $members =~ s/\bstruct_group_(attr|tagged)\s*\(([^,]*,){2}/STRUCT_GROUP(/gos; + $members =~ s/\bstruct_group_attr\s*\(([^,]*,){2}/STRUCT_GROUP(/gos; + $members =~ s/\bstruct_group_tagged\s*\(([^,]*),([^,]*),/struct $1 $2; STRUCT_GROUP(/gos; $members =~ s/\b__struct_group\s*\(([^,]*,){3}/STRUCT_GROUP(/gos; $members =~ s/\bSTRUCT_GROUP(\(((?:(?>[^)(]+)|(?1))*)\))[^;]*;/$2/gos;