[PATCH 05/29] scripts: kernel-doc: accept negation like !@var

[Paolo Bonzini]

From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

On a few places, it sometimes need to indicate a negation of a
parameter, like:

        !@fshared

This pattern happens, for example, at:

        kernel/futex.c

and it is perfectly valid. However, kernel-doc currently
transforms it into:

        !**fshared**

This won't do what it would be expected.

Fortunately, fixing the script is a simple matter of storing
the "!" before "@" and adding it after the bold markup, like:

        **!fshared**

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: 
https://lore.kernel.org/r/0314b47f8c3e1f9db00d5375a73dc3cddd8a21f2.1586881715.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 scripts/kernel-doc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 99530fb08b..e4b3cd486f 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -215,6 +215,7 @@ my $type_constant = '\b``([^\`]+)``\b';
 my $type_constant2 = '\%([-_\w]+)';
 my $type_func = '(\w+)\(\)';
 my $type_param = '\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)';
+my $type_param_ref = '([\!]?)\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)';
 my $type_fp_param = '\@(\w+)\(\)';  # Special RST handling for func ptr params
 my $type_fp_param2 = '\@(\w+->\S+)\(\)';  # Special RST handling for structs 
with func ptr params
 my $type_env = '(\$\w+)';
@@ -239,6 +240,7 @@ my @highlights_man = (
                       [$type_typedef, "\\\\fI\$1\\\\fP"],
                       [$type_union, "\\\\fI\$1\\\\fP"],
                       [$type_param, "\\\\fI\$1\\\\fP"],
+                      [$type_param_ref, "\\\\fI\$1\$2\\\\fP"],
                       [$type_member, "\\\\fI\$1\$2\$3\\\\fP"],
                       [$type_fallback, "\\\\fI\$1\\\\fP"]
                     );
@@ -260,7 +262,7 @@ my @highlights_rst = (
                        [$type_union, "\\:c\\:type\\:`\$1 <\$2>`"],
                        # in rst this can refer to any type
                        [$type_fallback, "\\:c\\:type\\:`\$1`"],
-                       [$type_param, "**\$1**"]
+                       [$type_param_ref, "**\$1\$2**"]
                      );
 my $blankline_rst = "\n";
 
-- 
2.28.0