[PATCH v5 3/5] checkpatch: Add --userspace to force userspace rules

[Petr Vorel]

Also allow to use --no-userspace for userspace projects which vendored
checkpatch.pl and use --userspace globally to be able switch it off for
files with kernel code.

Signed-off-by: Petr Vorel <pvorel@xxxxxxx>
---
Changes v4->v5 (all by sashiko):
* Allow --no-userspace to override setup in the config (using undef
  instead of 0, separate checks in is_userspace())

 scripts/checkpatch.pl | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index b458c7f22684..ead35e6abba7 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -63,6 +63,7 @@ my $env_config_dir = 'CHECKPATCH_CONFIG_DIR';
 my $max_line_length = 100;
 my $ignore_perl_version = 0;
 my $spdx_cxx_comments = 0;
+my $userspace;
 my $minimum_perl_version = 5.10.0;
 my $min_conf_desc_length = 4;
 my $spelling_file = "$D/spelling.txt";
@@ -143,6 +144,7 @@ Options:
                              (required by old toolchains), allow also C++
                              comments (//).
                              NOTE: it should *not* be used for Linux mainline.
+  --userspace                Force rules specific for userspace.
   --codespell                Use the codespell dictionary for spelling/typos
                              (default:$codespellfile)
   --codespellfile            Use this codespell dictionary
@@ -358,6 +360,7 @@ GetOptions(
 	'codespell!'	=> \$codespell,
 	'codespellfile=s'	=> \$user_codespellfile,
 	'typedefsfile=s'	=> \$typedefsfile,
+	'userspace!'	=> \$userspace,
 	'color=s'	=> \$color,
 	'no-color'	=> \$color,	#keep old behaviors of -nocolor
 	'nocolor'	=> \$color,	#keep old behaviors of -nocolor
@@ -2667,6 +2670,9 @@ sub exclude_global_initialisers {
 
 sub is_userspace {
     my ($realfile) = @_;
+
+    return $userspace if (defined $userspace);
+
     return ($realfile =~ m@^tools/@ ||
 		$realfile =~ m@^scripts/@ ||
 		$realfile =~ m@^arch/.*/tools/@);
-- 
2.55.0