[PATCH v4 1/3] checkpatch: Add more userspace directories to is_userspace()

arch/ directory contains subdirectories with userspace tools (at least
arch/*/tools/ and arch/*/boot/tools/). Add check to consider any
arch/.*/tools/ subdirectory as userspace tools directory.

This helps not only to strscpy() checks but also to CamelCase checks in
the next commit to be more precise.

Follow-up: 99b70ece33d8 ("checkpatch: suppress strscpy warnings for userspace tools")
Signed-off-by: Petr Vorel <[email protected]>
---
Changes v3->v4:
* Change test for directory to be more more generic (Joe)

 scripts/checkpatch.pl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 4f7325fd5825..1c6ef46bae1e 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2665,7 +2665,9 @@ sub exclude_global_initialisers {
 
 sub is_userspace {
     my ($realfile) = @_;
-    return ($realfile =~ m@^tools/@ || $realfile =~ m@^scripts/@);
+    return ($realfile =~ m@^tools/@ ||
+		$realfile =~ m@^scripts/@ ||
+		$realfile =~ m@^arch/.*\btools\b@);
 }
 
 sub process {
-- 
2.55.0