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Commit a3bb97a7 authored by Andy Whitcroft's avatar Andy Whitcroft Committed by Linus Torvalds
Browse files

checkpatch: macros: fix statement counting block end detection 



We are incorrectly counting the lines in a block while accumulating
the trailing lines in a macro statement, leading to false positives.
Fix end of block handling and general counting for negative context lines.

Signed-off-by: default avatarAndy Whitcroft <apw@shadowen.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 6ef9b297

scripts/checkpatch.pl

+11 −12
Original line number Diff line number Diff line
@@ -470,7 +470,9 @@ sub ctx_statement_block { 
		}

		$off++;

	}

	# We are truly at the end, so shuffle to the next line.

	if ($off == $len) {

		$loff = $len + 1;

		$line++;

		$remain--;

	}
@@ -1793,30 +1795,26 @@ sub process { 
				$lines[$ln - 1] =~ /^(?:-|..*\\$)/)

			{

				$ctx .= $rawlines[$ln - 1] . "\n";

				$cnt-- if ($lines[$ln - 1] !~ /^-/);

				$ln++;

				$cnt--;

			}

			$ctx .= $rawlines[$ln - 1];



			($dstat, $dcond, $ln, $cnt, $off) =

				ctx_statement_block($linenr, $ln - $linenr + 1, 0);

			#print "dstat<$dstat> dcond<$dcond> cnt<$cnt> off<$off>\n";

			#print "LINE<$lines[$ln]> len<" . length($lines[$ln]) . "\n";

			#print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n";



			# Extract the remainder of the define (if any) and

			# rip off surrounding spaces, and trailing \'s.

			$rest = '';

			if (defined $lines[$ln - 1] &&

			    $off > length($lines[$ln - 1]))

			{

				$ln++;

			while ($off != 0 || ($cnt > 0 && $rest =~ /(?:^|\\)\s*$/)) {

				#print "ADDING $off <" . substr($lines[$ln - 1], $off) . ">\n";

				if ($off != 0 || $lines[$ln - 1] !~ /^-/) {

					$rest .= substr($lines[$ln - 1], $off) . "\n";

					$cnt--;

				$off = 0;

				}

			while ($cnt > 0) {

				$rest .= substr($lines[$ln - 1], $off) . "\n";

				$ln++;

				$cnt--;

				$off = 0;

			}

			$rest =~ s/\\\n.//g;
@@ -1847,6 +1845,7 @@ sub process { 
				DEFINE_PER_CPU|

				__typeof__\(

			}x;

			#print "REST<$rest>\n";

			if ($rest ne '') {

				if ($rest !~ /while\s*\(/ &&

				    $dstat !~ /$exceptions/)