checkpatch: silence perl 5.26.0 unescaped left brace warnings

commit 8d81ae05d0176da1c54aeaed697fa34be5c5575e upstream.

As of perl 5, version 26, subversion 0 (v5.26.0) some new warnings have
occurred when running checkpatch.

Unescaped left brace in regex is deprecated here (and will be fatal in
Perl 5.30), passed through in regex; marked by <-- HERE in m/^(.\s*){
<-- HERE \s*/ at scripts/checkpatch.pl line 3544.

Unescaped left brace in regex is deprecated here (and will be fatal in
Perl 5.30), passed through in regex; marked by <-- HERE in m/^(.\s*){
<-- HERE \s*/ at scripts/checkpatch.pl line 3885.

Unescaped left brace in regex is deprecated here (and will be fatal in
Perl 5.30), passed through in regex; marked by <-- HERE in
m/^(\+.*(?:do|\))){ <-- HERE / at scripts/checkpatch.pl line 4374.

It seems perfectly reasonable to do as the warning suggests and simply
escape the left brace in these three locations.

Link: http://lkml.kernel.org/r/20170607060135.17384-1-cyrilbur@gmail.com
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index a8368d1..5517164 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3499,7 +3499,7 @@ sub process {
                                $fixedline =~ s/\s*=\s*$/ = {/;
                                fix_insert_line($fixlinenr, $fixedline);
                                $fixedline = $line;
-                               $fixedline =~ s/^(.\s*){\s*/$1/;
+                               $fixedline =~ s/^(.\s*)\{\s*/$1/;
                                fix_insert_line($fixlinenr, $fixedline);
                        }
                }
@@ -3840,7 +3840,7 @@ sub process {
                                my $fixedline = rtrim($prevrawline) . " {";
                                fix_insert_line($fixlinenr, $fixedline);
                                $fixedline = $rawline;
-                               $fixedline =~ s/^(.\s*){\s*/$1\t/;
+                               $fixedline =~ s/^(.\s*)\{\s*/$1\t/;
                                if ($fixedline !~ /^\+\s*$/) {
                                        fix_insert_line($fixlinenr, $fixedline);
                                }
@@ -4329,7 +4329,7 @@ sub process {
                        if (ERROR("SPACING",
                                  "space required before the open brace '{'\n" . $herecurr) &&
                            $fix) {
-                               $fixed[$fixlinenr] =~ s/^(\+.*(?:do|\))){/$1 {/;
+                               $fixed[$fixlinenr] =~ s/^(\+.*(?:do|\)))\{/$1 {/;
                        }
                }