checkpatch: add --strict test for spaces around arithmetic

Some prefer code to have spaces around arithmetic so instead of:
        a = b*c+d;
suggest
        a = b * c + d;

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 16 insertions, 1 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index bf232642cbb3..32bd31c1345c 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3689,7 +3689,22 @@ sub process {
                                          $op eq '*' or $op eq '/' or
                                          $op eq '%')
                                 {
-                                        if ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
+                                        if ($check) {
+                                                if (defined $fix_elements[$n + 2] && $ctx !~ /[EW]x[EW]/) {
+                                                        if (CHK("SPACING",
+                                                                "spaces preferred around that '$op' $at\n" . $hereptr)) {
+                                                                $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
+                                                                $fix_elements[$n + 2] =~ s/^\s+//;
+                                                                $line_fixed = 1;
+                                                        }
+                                                } elsif (!defined $fix_elements[$n + 2] && $ctx !~ /Wx[OE]/) {
+                                                        if (CHK("SPACING",
+                                                                "space preferred before that '$op' $at\n" . $hereptr)) {
+                                                                $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]);
+                                                                $line_fixed = 1;
+                                                        }
+                                                }
+                                        } elsif ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
                                                 if (ERROR("SPACING",
                                                           "need consistent spacing around '$op' $at\n" . $hereptr)) {
                                                         $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";