[PATCH] scripts/kernel-doc: Get -export option working again

[Akira Yokosawa]

Since commit cdd30ebb1b9f ("module: Convert symbol namespace to string
literal"), exported symbols marked by EXPORT_SYMBOL_NS(_GPL) are
ignored by "kernel-doc -export" in fresh build of "make htmldocs".

This is because regex in the perl script for those markers fails to
match the new signatures:

  - EXPORT_SYMBOL_NS(symbol, "ns");
  - EXPORT_SYMBOL_NS_GPL(symbol, "ns");

Update the regex so that it matches quoted string.

Note: Escape sequence of \w is good for C identifiers, but can be
too strict for quoted strings.  Instead, use \S, which matches any
non-whitespace character, for compatibility with possible extension
of namespace convention in the future [1].

Fixes: cdd30ebb1b9f ("module: Convert symbol namespace to string literal")
Link: https://lore.kernel.org/CAK7LNATMufXP0EA6QUE9hBkZMa6vJO6ZiaYuak2AhOrd2nSVKQ@xxxxxxxxxxxxxx/ [1]
Signed-off-by: Akira Yokosawa <akiyks@xxxxxxxxx>
Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
---
This fixes regression in v6.13-rc2.

Quick reproducer:

    ./script/kernel-doc -rst -export drivers/iommu/iommufd/device.c

On v6.13-rc2, kernel-doc will say:

     drivers/iommu/iommufd/device.c:1: warning: no structured comments found

With this patch applied, you'll get reST formatted kernel-doc comments. 

Akira
 
---
 scripts/kernel-doc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index f66070176ba3..4ee843d3600e 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -267,7 +267,7 @@ my $doc_inline_sect = '\s*\*\s*(@\s*[\w][\w\.]*\s*):(.*)';
 my $doc_inline_end = '^\s*\*/\s*$';
 my $doc_inline_oneline = '^\s*/\*\*\s*(@[\w\s]+):\s*(.*)\s*\*/\s*$';
 my $export_symbol = '^\s*EXPORT_SYMBOL(_GPL)?\s*\(\s*(\w+)\s*\)\s*;';
-my $export_symbol_ns = '^\s*EXPORT_SYMBOL_NS(_GPL)?\s*\(\s*(\w+)\s*,\s*\w+\)\s*;';
+my $export_symbol_ns = '^\s*EXPORT_SYMBOL_NS(_GPL)?\s*\(\s*(\w+)\s*,\s*"\S+"\)\s*;';
 my $function_pointer = qr{([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)};
 my $attribute = qr{__attribute__\s*\(\([a-z0-9,_\*\s\(\)]*\)\)}i;
 

base-commit: fac04efc5c793dccbd07e2d59af9f90b7fc0dca4
-- 
2.34.1