checkpatch: suggest cleanpatch and cleanfile when appropriate

When we hit types of whitespace which may be fixed by scripts/cleanpatch
and scripts/cleanfile suggest their use in our report.

Suggested-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 41f59b1e209b..32d6a236570d 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -103,6 +103,8 @@ for my $key (keys %debug) {
         die "$@" if ($@);
 }
 
+my $rpt_cleaners = 0;
+
 if ($terse) {
         $emacs = 1;
         $quiet++;
@@ -1389,6 +1391,7 @@ sub process {
                 } elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
                         my $herevet = "$here\n" . cat_vet($rawline) . "\n";
                         ERROR("trailing whitespace\n" . $herevet);
+                        $rpt_cleaners = 1;
                 }
 
 # check for Kconfig help text having a real description
@@ -1450,6 +1453,7 @@ sub process {
                     $rawline =~ /^\+\s*        \s*/) {
                         my $herevet = "$here\n" . cat_vet($rawline) . "\n";
                         ERROR("code indent should use tabs where possible\n" . $herevet);
+                        $rpt_cleaners = 1;
                 }
 
 # check for space before tabs.
@@ -2842,6 +2846,15 @@ sub process {
                 print "\n" if ($quiet == 0);
         }
 
+        if ($quiet == 0) {
+                # If there were whitespace errors which cleanpatch can fix
+                # then suggest that.
+                if ($rpt_cleaners) {
+                        print "NOTE: whitespace errors detected, you may wish to use scripts/cleanpatch or\n";
+                        print "      scripts/cleanfile\n\n";
+                }
+        }
+
         if ($clean == 1 && $quiet == 0) {
                 print "$vname has no obvious style problems and is ready for submission.\n"
         }