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-rwxr-xr-xscripts/checkpatch.pl18
1 files changed, 18 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 0c520f7bf095..7a360a8c1b91 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4066,12 +4066,17 @@ sub process {
my $cnt = $realcnt;
my ($off, $dstat, $dcond, $rest);
my $ctx = '';
+ my $has_flow_statement = 0;
+ my $has_arg_concat = 0;
($dstat, $dcond, $ln, $cnt, $off) =
ctx_statement_block($linenr, $realcnt, 0);
$ctx = $dstat;
#print "dstat<$dstat> dcond<$dcond> cnt<$cnt> off<$off>\n";
#print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n";
+ $has_flow_statement = 1 if ($ctx =~ /\b(goto|return)\b/);
+ $has_arg_concat = 1 if ($ctx =~ /\#\#/);
+
$dstat =~ s/^.\s*\#\s*define\s+$Ident(?:\([^\)]*\))?\s*//;
$dstat =~ s/$;//g;
$dstat =~ s/\\\n.//g;
@@ -4136,6 +4141,19 @@ sub process {
}
}
+# check for macros with flow control, but without ## concatenation
+# ## concatenation is commonly a macro that defines a function so ignore those
+ if ($has_flow_statement && !$has_arg_concat) {
+ my $herectx = $here . "\n";
+ my $cnt = statement_rawlines($ctx);
+
+ for (my $n = 0; $n < $cnt; $n++) {
+ $herectx .= raw_line($linenr, $n) . "\n";
+ }
+ WARN("MACRO_WITH_FLOW_CONTROL",
+ "Macros with flow control statements should be avoided\n" . "$herectx");
+ }
+
# check for line continuations outside of #defines, preprocessor #, and asm
} else {