[PATCH v2] scripts/tags.sh: Prevent binary files appearing in cscope.files

When executing the command `make COMPILED_SOURCE=1 cscope`, the resulting
`cscope.files` file contains filenames with the extensions *.rlib, *.rmeta,
and *.so.

To fix this, modify the regular expression in the `all_compiled_sources()`
function so that only files with the extensions *.h, *.c, *.S, and *.rs are
accepted.

The issue has been introduced by commit 4f491bb6ea2a ("scripts/tags.sh: collect
compiled source precisely") which implemented the parsing of compiled sources
from *.cmd files instead of using the "find" command.

Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Fixes: 4f491bb6ea2a ("scripts/tags.sh: collect compiled source precisely")
Signed-off-by: Sergei Litvin <[email protected]>

---

This is the first part of this patch:
https://lore.kernel.org/lkml/[email protected]/

which I have split into two parts, as suggested by Nicolas Schier here:
https://lore.kernel.org/lkml/akVkIrcpNxZrrfii@levanger/

Changes since V1:
https://lore.kernel.org/lkml/[email protected]/

as suggested by Miguel Ojeda here:
https://lore.kernel.org/lkml/CANiq72kHbVQfNrum5D2a5sCd3mFQHNtigrQxP1WW=YcggxA=WQ@mail.gmail.com/

- Add "Cc: [email protected]" tag
- Add "Fixes:" tag
- Add missed "Signed-off-by:" tag
---
 scripts/tags.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/tags.sh b/scripts/tags.sh
index 243373683f98..c9dc2763a505 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -100,7 +100,7 @@ all_compiled_sources()
 	{
 		echo include/generated/autoconf.h
 		find $ignore -name "*.cmd" -exec \
-			grep -Poh '(?<=^  )\S+|(?<== )\S+[^\\](?=$)' {} \+ |
+			grep -Poh '(?<=^  )\S+\.([chS]|rs)(?=\s)|(?<== )\S+\.(?1)(?=$)' {} \+ |
 		awk '!a[$0]++'
 	} | xargs realpath -esq $([ -z "$KBUILD_ABS_SRCTREE" ] && echo --relative-to=.) |
 	sort -u
-- 
2.55.0