checkpatch: toughen trailing if statement checks and extend them to while and for

Extend the trailing statement checks to report a trailing semi-colon ';'
as we really want it on the next line and indented so it is really really
obvious.  Also extend the tests to include while and for.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index e7c8ab1..8616bae 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1269,8 +1269,8 @@ sub process {
                                $ctx_ln++;
                        }
 
-                       ##print "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n";
-                       ##print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
+                       #print "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n";
+                       #print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
 
                        if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln -1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
                                ERROR("that open brace { should be on the previous line\n" .
@@ -1713,7 +1713,7 @@ sub process {
                }
 
 # Check for illegal assignment in if conditional.
-               if ($line =~ /\bif\s*\(/) {
+               if ($line =~ /\b(?:if|while|for)\s*\(/ && $line !~ /^.\s*#/) {
                        my ($s, $c) = ($stat, $cond);
 
                        if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/) {
@@ -1725,8 +1725,8 @@ sub process {
                        substr($s, 0, length($c), '');
                        $s =~ s/\n.*//g;
                        $s =~ s/$;//g;  # Remove any comments
-                       if (length($c) && $s !~ /^\s*({|;|)\s*\\*\s*$/ &&
-                           $c !~ /^.\s*\#\s*if/)
+                       if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ &&
+                           $c !~ /}\s*while\s*/)
                        {
                                ERROR("trailing statements should be on next line\n" . $herecurr);
                        }