checkpatch: Eliminate false positive in case of space before square bracket in a definition

Now, macro definition such as "#define abc(x) [x] = y" should pass
without an error.
Signed-off-by: NLeonid Bloch <leonid@daynix.com>
Message-Id: <1446112118-12376-3-git-send-email-leonid@daynix.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

scripts/checkpatch.pl

@@ -1716,11 +1716,13 @@ sub process {
 #  2. at the beginning of a line for slice initialisers -- [0...10] = 5,
 #  3. inside a curly brace -- = { [0...10] = 5 }
 #  4. after a comma -- [1] = 5, [2] = 6
+#  5. in a macro definition -- #define abc(x) [x] = y
 		while ($line =~ /(.*?\s)\[/g) {
 			my ($where, $prefix) = ($-[1], $1);
 			if ($prefix !~ /$Type\s+$/ &&
 			    ($where != 0 || $prefix !~ /^.\s+$/) &&
 			    $prefix !~ /{\s+$/ &&
+			    $prefix !~ /\#\s*define[^(]*\([^)]*\)\s+$/ &&
 			    $prefix !~ /,\s+$/) {
 				ERROR("space prohibited before open square bracket '['\n" . $herecurr);
 			}