This is a note to let you know that I've just added the patch titled scripts/tags.sh: fix incompatibility with PCRE2 to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: scripts-tags.sh-fix-incompatibility-with-pcre2.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 6ec363fc6142226b9ab5a6528f65333d729d2b6b Mon Sep 17 00:00:00 2001 From: Carlos Llamas <cmllamas@xxxxxxxxxx> Date: Wed, 15 Feb 2023 18:38:50 +0000 Subject: scripts/tags.sh: fix incompatibility with PCRE2 From: Carlos Llamas <cmllamas@xxxxxxxxxx> commit 6ec363fc6142226b9ab5a6528f65333d729d2b6b upstream. Starting with release 10.38 PCRE2 drops default support for using \K in lookaround patterns as described in [1]. Unfortunately, scripts/tags.sh relies on such functionality to collect all_compiled_soures() leading to the following error: $ make COMPILED_SOURCE=1 tags GEN tags grep: \K is not allowed in lookarounds (but see PCRE2_EXTRA_ALLOW_LOOKAROUND_BSK) The usage of \K for this pattern was introduced in commit 4f491bb6ea2a ("scripts/tags.sh: collect compiled source precisely") which speeds up the generation of tags significantly. In order to fix this issue without compromising the performance we can switch over to an equivalent sed expression. The same matching pattern is preserved here except \K is replaced with a backreference \1. [1] https://www.pcre.org/current/doc/html/pcre2syntax.html#SEC11 Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx> Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx> Cc: Jialu Xu <xujialu@xxxxxxxxx> Cc: Vipin Sharma <vipinsh@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Fixes: 4f491bb6ea2a ("scripts/tags.sh: collect compiled source precisely") Signed-off-by: Carlos Llamas <cmllamas@xxxxxxxxxx> Link: https://lore.kernel.org/r/20230215183850.3353198-1-cmllamas@xxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- scripts/tags.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/scripts/tags.sh +++ b/scripts/tags.sh @@ -98,7 +98,7 @@ all_compiled_sources() { echo include/generated/autoconf.h find $ignore -name "*.cmd" -exec \ - grep -Poh '(?(?=^source_.* \K).*|(?=^ \K\S).*(?= \\))' {} \+ | + sed -n -E 's/^source_.* (.*)/\1/p; s/^ (\S.*) \\/\1/p' {} \+ | awk '!a[$0]++' } | xargs realpath -es $([ -z "$KBUILD_ABS_SRCTREE" ] && echo --relative-to=.) | sort -u Patches currently in stable-queue which might be from cmllamas@xxxxxxxxxx are queue-5.15/scripts-tags.sh-invoke-realpath-via-xargs.patch queue-5.15/scripts-tags.sh-fix-incompatibility-with-pcre2.patch