checkpatch: add spell checking of email subject line

Only commit log and patch additions are checked for typos and spelling
errors currently.  Add a check of the email subject line too.

Signed-off-by: Joe Perches <joe@perches.com>
Suggested-by: Jani Nikula <jani.nikula@linux.intel.com>
Tested-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 421bbb47844f..c061a63afa20 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2303,7 +2303,8 @@ sub process {
                 }
 
 # Check for various typo / spelling mistakes
-                if (defined($misspellings) && ($in_commit_log || $line =~ /^\+/)) {
+                if (defined($misspellings) &&
+                    ($in_commit_log || $line =~ /^(?:\+|Subject:)/i)) {
                         while ($rawline =~ /(?:^|[^a-z@])($misspellings)(?:$|[^a-z@])/gi) {
                                 my $typo = $1;
                                 my $typo_fix = $spelling_fix{lc($typo)};