checkpatch: add --strict test for lines ending in [ or (

Lines that end in an open bracket or open parenthesis are generally hard
to follow.  Lines following those ending with open parenthesis are also
rarely aligned to that open parenthesis.

Suggest not ending lines with '[' or '('

Link: http://lkml.kernel.org/r/8fd0b2b4a7482064254e37931eb9302a81d5aa2f.1508340786.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Suggested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 6bdd43d5dec5..3453df9f90ab 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3184,6 +3184,12 @@ sub process {
 # check we are in a valid C source file if not then ignore this hunk
                 next if ($realfile !~ /\.(h|c)$/);
 
+# check for unusual line ending [ or (
+                if ($line =~ /^\+.*([\[\(])\s*$/) {
+                        CHK("OPEN_ENDED_LINE",
+                            "Lines should not end with a '$1'\n" . $herecurr);
+                }
+
 # check if this appears to be the start function declaration, save the name
                 if ($sline =~ /^\+\{\s*$/ &&
                     $prevline =~ /^\+(?:(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*)?($Ident)\(/) {