From 7428f9d97006e35a9c4798bcbf0e26101144d12d Mon Sep 17 00:00:00 2001
From: Costa Shulyupin <costa.shul@redhat.com>
Date: Fri, 25 Oct 2024 16:03:16 +0300
Subject: [PATCH] scripts/tags.sh: Fix warnings "null expansion of name
 pattern"

Warnings such as
ctags: Warning: include/linux/wait_bit.h:59: null expansion of name pattern "\1"
are triggered when parsing DECLARE_BITMAP() inside comments,
resulting in an empty token.

To avoid this, ensure only non-empty tokens.

Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
Link: https://lore.kernel.org/r/20241025130322.3077455-1-costa.shul@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 scripts/tags.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/tags.sh b/scripts/tags.sh
index 933e923e085a..c04f43d91517 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -191,7 +191,7 @@ regex_c=(
 	'/\<DEFINE_\(RT_MUTEX\|MUTEX\|SEMAPHORE\|SPINLOCK\)([[:space:]]*\([[:alnum:]_]*\)/\2/v/'
 	'/\<DEFINE_\(RAW_SPINLOCK\|RWLOCK\|SEQLOCK\)([[:space:]]*\([[:alnum:]_]*\)/\2/v/'
 	'/\<DECLARE_\(RWSEM\|COMPLETION\)([[:space:]]*\([[:alnum:]_]\+\)/\2/v/'
-	'/\<DECLARE_BITMAP([[:space:]]*\([[:alnum:]_]*\)/\1/v/'
+	'/\<DECLARE_BITMAP([[:space:]]*\([[:alnum:]_]\+\)/\1/v/'
 	'/\(^\|\s\)\(\|L\|H\)LIST_HEAD([[:space:]]*\([[:alnum:]_]*\)/\3/v/'
 	'/\(^\|\s\)RADIX_TREE([[:space:]]*\([[:alnum:]_]*\)/\2/v/'
 	'/\<DEFINE_PER_CPU([^,]*,[[:space:]]*\([[:alnum:]_]*\)/\1/v/'
-- 
2.50.1