checkpatch: Escape left braces in regex

Latest perl now deprecates "{" literal in regex and print warnings like
"unescaped left brace in regex is deprecated".  Add escape to keep it
happy.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <1441969656-2640-1-git-send-email-famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 4ac00a9..574334b 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -582,7 +582,7 @@ sub statement_block_size {
        my ($stmt) = @_;
 
        $stmt =~ s/(^|\n)./$1/g;
-       $stmt =~ s/^\s*{//;
+       $stmt =~ s/^\s*\{//;
        $stmt =~ s/}\s*$//;
        $stmt =~ s/^\s*//;
        $stmt =~ s/\s*$//;
@@ -1479,7 +1479,7 @@ sub process {
                        # 79 or 80 characters, it is no longer possible to add a space and an
                        # opening brace there)
                        if ($#ctx == 0 && $ctx !~ /{\s*/ &&
-                           defined($lines[$ctx_ln - 1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/ &&
+                           defined($lines[$ctx_ln - 1]) && $lines[$ctx_ln - 1] =~ /^\+\s*\{/ &&
                            defined($lines[$ctx_ln - 2]) && length($lines[$ctx_ln - 2]) < 80) {
                                ERROR("that open brace { should be on the previous line\n" .
                                        "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
@@ -1519,7 +1519,7 @@ sub process {
                        my $continuation = 0;
                        my $check = 0;
                        $s =~ s/^.*\bdo\b//;
-                       $s =~ s/^\s*{//;
+                       $s =~ s/^\s*\{//;
                        if ($s =~ s/^\s*\\//) {
                                $continuation = 1;
                        }
@@ -1618,7 +1618,7 @@ sub process {
                }
 
 # check for initialisation to aggregates open brace on the next line
-               if ($line =~ /^.\s*{/ &&
+               if ($line =~ /^.\s*\{/ &&
                    $prevline =~ /(?:^|[^=])=\s*$/) {
                        ERROR("that open brace { should be on the previous line\n" . $hereprev);
                }
@@ -1693,13 +1693,13 @@ sub process {
 
 # function brace can't be on same line, except for #defines of do while,
 # or if closed on same line
-               if (($line=~/$Type\s*$Ident\(.*\).*\s{/) and
-                   !($line=~/\#\s*define.*do\s{/) and !($line=~/}/)) {
+               if (($line=~/$Type\s*$Ident\(.*\).*\s\{/) and
+                   !($line=~/\#\s*define.*do\s\{/) and !($line=~/}/)) {
                        ERROR("open brace '{' following function declarations go on the next line\n" . $herecurr);
                }
 
 # open braces for enum, union and struct go on the same line.
-               if ($line =~ /^.\s*{/ &&
+               if ($line =~ /^.\s*\{/ &&
                    $prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) {
                        ERROR("open brace '{' following $1 go on the same line\n" . $hereprev);
                }
@@ -1853,7 +1853,7 @@ sub process {
                                 # not required when having a single },{ on one line
                                } elsif ($op eq ',') {
                                        if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/ &&
-                                            ($elements[$n] . $elements[$n + 2]) !~ " *}{") {
+                                            ($elements[$n] . $elements[$n + 2]) !~ " *}\\{") {
                                                ERROR("space required after that '$op' $at\n" . $hereptr);
                                        }
 
@@ -1953,8 +1953,8 @@ sub process {
                }
 
 #need space before brace following if, while, etc
-               if (($line =~ /\(.*\){/ && $line !~ /\($Type\){/) ||
-                   $line =~ /do{/) {
+               if (($line =~ /\(.*\)\{/ && $line !~ /\($Type\)\{/) ||
+                   $line =~ /do\{/) {
                        ERROR("space required before the open brace '{'\n" . $herecurr);
                }
 
@@ -2268,7 +2268,7 @@ sub process {
                                        my $spaced_block = $block;
                                        $spaced_block =~ s/\n\+/ /g;
 
-                                       $seen++ if ($spaced_block =~ /^\s*{/);
+                                       $seen++ if ($spaced_block =~ /^\s*\{/);
 
                                         print "APW: cond<$cond> block<$block> allowed<$allowed>\n"
                                             if $dbg_adv_apw;