checkpatch.pl

			}

			if (show_type("SPACING") && $fix) {
				$fixed[$fixlinenr] =~
				    s/^(.\s*)$Declare\s*\(\s*\*\s*$Ident\s*\)\s*\(/$1 . $declare . $post_declare_space . '(*' . $funcname . ')('/ex;
			}
		}

# check for spacing round square brackets; allowed:
#  1. with a type on the left -- int [] a;
#  2. at the beginning of a line for slice initialisers -- [0...10] = 5,
#  3. inside a curly brace -- = { [0...10] = 5 }
		while ($line =~ /(.*?\s)\[/g) {
			my ($where, $prefix) = ($-[1], $1);
			if ($prefix !~ /$Type\s+$/ &&
			    ($where != 0 || $prefix !~ /^.\s+$/) &&
			    $prefix !~ /[{,]\s+$/) {
				if (ERROR("BRACKET_SPACE",
					  "space prohibited before open square bracket '['\n" . $herecurr) &&
				    $fix) {
				    $fixed[$fixlinenr] =~
					s/^(\+.*?)\s+\[/$1\[/;
				}
			}
		}

# check for spaces between functions and their parentheses.
		while ($line =~ /($Ident)\s+\(/g) {
			my $name = $1;
			my $ctx_before = substr($line, 0, $-[1]);
			my $ctx = "$ctx_before$name";

			# Ignore those directives where spaces _are_ permitted.
			if ($name =~ /^(?:
				if|for|while|switch|return|case|
				volatile|__volatile__|
				__attribute__|format|__extension__|
				asm|__asm__)$/x)
			{
			# cpp #define statements have non-optional spaces, ie
			# if there is a space between the name and the open
			# parenthesis it is simply not a parameter group.
			} elsif ($ctx_before =~ /^.\s*\#\s*define\s*$/) {

			# cpp #elif statement condition may start with a (
			} elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) {

			# If this whole things ends with a type its most
			# likely a typedef for a function.
			} elsif ($ctx =~ /$Type$/) {

			} else {
				if (WARN("SPACING",
					 "space prohibited between function name and open parenthesis '('\n" . $herecurr) &&
					     $fix) {
					$fixed[$fixlinenr] =~
					    s/\b$name\s+\(/$name\(/;
				}
			}
		}

# Check operator spacing.
		if (!($line=~/\#\s*include/)) {
			my $fixed_line = "";
			my $line_fixed = 0;

			my $ops = qr{
				<<=|>>=|<=|>=|==|!=|
				\+=|-=|\*=|\/=|%=|\^=|\|=|&=|
				=>|->|<<|>>|<|>|=|!|~|
				&&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%|
				\?:|\?|:
			}x;
			my @elements = split(/($ops|;)/, $opline);

##			print("element count: <" . $#elements . ">\n");
##			foreach my $el (@elements) {
##				print("el: <$el>\n");
##			}

			my @fix_elements = ();
			my $off = 0;

			foreach my $el (@elements) {
				push(@fix_elements, substr($rawline, $off, length($el)));
				$off += length($el);
			}

			$off = 0;

			my $blank = copy_spacing($opline);
			my $last_after = -1;

			for (my $n = 0; $n < $#elements; $n += 2) {

				my $good = $fix_elements[$n] . $fix_elements[$n + 1];

##				print("n: <$n> good: <$good>\n");

				$off += length($elements[$n]);

				# Pick up the preceding and succeeding characters.
				my $ca = substr($opline, 0, $off);
				my $cc = '';
				if (length($opline) >= ($off + length($elements[$n + 1]))) {
					$cc = substr($opline, $off + length($elements[$n + 1]));
				}
				my $cb = "$ca$;$cc";

				my $a = '';
				$a = 'V' if ($elements[$n] ne '');
				$a = 'W' if ($elements[$n] =~ /\s$/);
				$a = 'C' if ($elements[$n] =~ /$;$/);
				$a = 'B' if ($elements[$n] =~ /(\[|\()$/);
				$a = 'O' if ($elements[$n] eq '');
				$a = 'E' if ($ca =~ /^\s*$/);

				my $op = $elements[$n + 1];

				my $c = '';
				if (defined $elements[$n + 2]) {
					$c = 'V' if ($elements[$n + 2] ne '');
					$c = 'W' if ($elements[$n + 2] =~ /^\s/);
					$c = 'C' if ($elements[$n + 2] =~ /^$;/);
					$c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
					$c = 'O' if ($elements[$n + 2] eq '');
					$c = 'E' if ($elements[$n + 2] =~ /^\s*\\$/);
				} else {
					$c = 'E';
				}

				my $ctx = "${a}x${c}";

				my $at = "(ctx:$ctx)";

				my $ptr = substr($blank, 0, $off) . "^";
				my $hereptr = "$hereline$ptr\n";

				# Pull out the value of this operator.
				my $op_type = substr($curr_values, $off + 1, 1);

				# Get the full operator variant.
				my $opv = $op . substr($curr_vars, $off, 1);

				# Ignore operators passed as parameters.
				if ($op_type ne 'V' &&
				    $ca =~ /\s$/ && $cc =~ /^\s*[,\)]/) {

#				# Ignore comments
#				} elsif ($op =~ /^$;+$/) {

				# ; should have either the end of line or a space or \ after it
				} elsif ($op eq ';') {
					if ($ctx !~ /.x[WEBC]/ &&
					    $cc !~ /^\\/ && $cc !~ /^;/) {
						if (ERROR("SPACING",
							  "space required after that '$op' $at\n" . $hereptr)) {
							$good = $fix_elements[$n] . trim($fix_elements[$n + 1]) . " ";
							$line_fixed = 1;
						}
					}

				# // is a comment
				} elsif ($op eq '//') {

				#   :   when part of a bitfield
				} elsif ($opv eq ':B') {
					# skip the bitfield test for now

				# No spaces for:
				#   ->
				} elsif ($op eq '->') {
					if ($ctx =~ /Wx.|.xW/) {
						if (ERROR("SPACING",
							  "spaces prohibited around that '$op' $at\n" . $hereptr)) {
							$good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
							if (defined $fix_elements[$n + 2]) {
								$fix_elements[$n + 2] =~ s/^\s+//;
							}
							$line_fixed = 1;
						}
					}

				# , must not have a space before and must have a space on the right.
				} elsif ($op eq ',') {
					my $rtrim_before = 0;
					my $space_after = 0;
					if ($ctx =~ /Wx./) {
						if (ERROR("SPACING",
							  "space prohibited before that '$op' $at\n" . $hereptr)) {
							$line_fixed = 1;
							$rtrim_before = 1;
						}
					}
					if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
						if (ERROR("SPACING",
							  "space required after that '$op' $at\n" . $hereptr)) {
							$line_fixed = 1;
							$last_after = $n;
							$space_after = 1;
						}
					}
					if ($rtrim_before || $space_after) {
						if ($rtrim_before) {
							$good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
						} else {
							$good = $fix_elements[$n] . trim($fix_elements[$n + 1]);
						}
						if ($space_after) {
							$good .= " ";
						}
					}

				# '*' as part of a type definition -- reported already.
				} elsif ($opv eq '*_') {
					#warn "'*' is part of type\n";

				# unary operators should have a space before and
				# none after.  May be left adjacent to another
				# unary operator, or a cast
				} elsif ($op eq '!' || $op eq '~' ||
					 $opv eq '*U' || $opv eq '-U' ||
					 $opv eq '&U' || $opv eq '&&U') {
					if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
						if (ERROR("SPACING",
							  "space required before that '$op' $at\n" . $hereptr)) {
							if ($n != $last_after + 2) {
								$good = $fix_elements[$n] . " " . ltrim($fix_elements[$n + 1]);
								$line_fixed = 1;
							}
						}
					}
					if ($op eq '*' && $cc =~/\s*$Modifier\b/) {
						# A unary '*' may be const

					} elsif ($ctx =~ /.xW/) {
						if (ERROR("SPACING",
							  "space prohibited after that '$op' $at\n" . $hereptr)) {
							$good = $fix_elements[$n] . rtrim($fix_elements[$n + 1]);
							if (defined $fix_elements[$n + 2]) {
								$fix_elements[$n + 2] =~ s/^\s+//;
							}
							$line_fixed = 1;
						}
					}

				# unary ++ and unary -- are allowed no space on one side.
				} elsif ($op eq '++' or $op eq '--') {
					if ($ctx !~ /[WEOBC]x[^W]/ && $ctx !~ /[^W]x[WOBEC]/) {
						if (ERROR("SPACING",
							  "space required one side of that '$op' $at\n" . $hereptr)) {
							$good = $fix_elements[$n] . trim($fix_elements[$n + 1]) . " ";
							$line_fixed = 1;
						}
					}
					if ($ctx =~ /Wx[BE]/ ||
					    ($ctx =~ /Wx./ && $cc =~ /^;/)) {
						if (ERROR("SPACING",
							  "space prohibited before that '$op' $at\n" . $hereptr)) {
							$good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
							$line_fixed = 1;
						}
					}
					if ($ctx =~ /ExW/) {
						if (ERROR("SPACING",
							  "space prohibited after that '$op' $at\n" . $hereptr)) {
							$good = $fix_elements[$n] . trim($fix_elements[$n + 1]);
							if (defined $fix_elements[$n + 2]) {
								$fix_elements[$n + 2] =~ s/^\s+//;
							}
							$line_fixed = 1;
						}
					}

				# << and >> may either have or not have spaces both sides
				} elsif ($op eq '<<' or $op eq '>>' or
					 $op eq '&' or $op eq '^' or $op eq '|' or
					 $op eq '+' or $op eq '-' or
					 $op eq '*' or $op eq '/' or
					 $op eq '%')
				{
					if ($check) {
						if (defined $fix_elements[$n + 2] && $ctx !~ /[EW]x[EW]/) {
							if (CHK("SPACING",
								"spaces preferred around that '$op' $at\n" . $hereptr)) {
								$good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
								$fix_elements[$n + 2] =~ s/^\s+//;
								$line_fixed = 1;
							}
						} elsif (!defined $fix_elements[$n + 2] && $ctx !~ /Wx[OE]/) {
							if (CHK("SPACING",
								"space preferred before that '$op' $at\n" . $hereptr)) {
								$good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]);
								$line_fixed = 1;
							}
						}
					} elsif ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
						if (ERROR("SPACING",
							  "need consistent spacing around '$op' $at\n" . $hereptr)) {
							$good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
							if (defined $fix_elements[$n + 2]) {
								$fix_elements[$n + 2] =~ s/^\s+//;
							}
							$line_fixed = 1;
						}
					}

				# A colon needs no spaces before when it is
				# terminating a case value or a label.
				} elsif ($opv eq ':C' || $opv eq ':L') {
					if ($ctx =~ /Wx./) {
						if (ERROR("SPACING",
							  "space prohibited before that '$op' $at\n" . $hereptr)) {
							$good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
							$line_fixed = 1;
						}
					}

				# All the others need spaces both sides.
				} elsif ($ctx !~ /[EWC]x[CWE]/) {
					my $ok = 0;

					# Ignore email addresses <foo@bar>
					if (($op eq '<' &&
					     $cc =~ /^\S+\@\S+>/) ||
					    ($op eq '>' &&
					     $ca =~ /<\S+\@\S+$/))
					{
					    	$ok = 1;
					}

					# for asm volatile statements
					# ignore a colon with another
					# colon immediately before or after
					if (($op eq ':') &&
					    ($ca =~ /:$/ || $cc =~ /^:/)) {
						$ok = 1;
					}

					# messages are ERROR, but ?: are CHK
					if ($ok == 0) {
						my $msg_type = \&ERROR;
						$msg_type = \&CHK if (($op eq '?:' || $op eq '?' || $op eq ':') && $ctx =~ /VxV/);

						if (&{$msg_type}("SPACING",
								 "spaces required around that '$op' $at\n" . $hereptr)) {
							$good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
							if (defined $fix_elements[$n + 2]) {
								$fix_elements[$n + 2] =~ s/^\s+//;
							}
							$line_fixed = 1;
						}
					}
				}
				$off += length($elements[$n + 1]);

##				print("n: <$n> GOOD: <$good>\n");

				$fixed_line = $fixed_line . $good;
			}

			if (($#elements % 2) == 0) {
				$fixed_line = $fixed_line . $fix_elements[$#elements];
			}

			if ($fix && $line_fixed && $fixed_line ne $fixed[$fixlinenr]) {
				$fixed[$fixlinenr] = $fixed_line;
			}


		}

# check for whitespace before a non-naked semicolon
		if ($line =~ /^\+.*\S\s+;\s*$/) {
			if (WARN("SPACING",
				 "space prohibited before semicolon\n" . $herecurr) &&
			    $fix) {
				1 while $fixed[$fixlinenr] =~
				    s/^(\+.*\S)\s+;/$1;/;
			}
		}

# check for multiple assignments
		if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
			CHK("MULTIPLE_ASSIGNMENTS",
			    "multiple assignments should be avoided\n" . $herecurr);
		}

## # check for multiple declarations, allowing for a function declaration
## # continuation.
## 		if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
## 		    $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
##
## 			# Remove any bracketed sections to ensure we do not
## 			# falsly report the parameters of functions.
## 			my $ln = $line;
## 			while ($ln =~ s/\([^\(\)]*\)//g) {
## 			}
## 			if ($ln =~ /,/) {
## 				WARN("MULTIPLE_DECLARATION",
##				     "declaring multiple variables together should be avoided\n" . $herecurr);
## 			}
## 		}

#need space before brace following if, while, etc
		if (($line =~ /\(.*\)\{/ && $line !~ /\($Type\)\{/) ||
		    $line =~ /do\{/) {
			if (ERROR("SPACING",
				  "space required before the open brace '{'\n" . $herecurr) &&
			    $fix) {
				$fixed[$fixlinenr] =~ s/^(\+.*(?:do|\)))\{/$1 {/;
			}
		}

## # check for blank lines before declarations
##		if ($line =~ /^.\t+$Type\s+$Ident(?:\s*=.*)?;/ &&
##		    $prevrawline =~ /^.\s*$/) {
##			WARN("SPACING",
##			     "No blank lines before declarations\n" . $hereprev);
##		}
##

# closing brace should have a space following it when it has anything
# on the line
		if ($line =~ /}(?!(?:,|;|\)))\S/) {
			if (ERROR("SPACING",
				  "space required after that close brace '}'\n" . $herecurr) &&
			    $fix) {
				$fixed[$fixlinenr] =~
				    s/}((?!(?:,|;|\)))\S)/} $1/;
			}
		}

# check spacing on square brackets
		if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
			if (ERROR("SPACING",
				  "space prohibited after that open square bracket '['\n" . $herecurr) &&
			    $fix) {
				$fixed[$fixlinenr] =~
				    s/\[\s+/\[/;
			}
		}
		if ($line =~ /\s\]/) {
			if (ERROR("SPACING",
				  "space prohibited before that close square bracket ']'\n" . $herecurr) &&
			    $fix) {
				$fixed[$fixlinenr] =~
				    s/\s+\]/\]/;
			}
		}

# check spacing on parentheses
		if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
		    $line !~ /for\s*\(\s+;/) {
			if (ERROR("SPACING",
				  "space prohibited after that open parenthesis '('\n" . $herecurr) &&
			    $fix) {
				$fixed[$fixlinenr] =~
				    s/\(\s+/\(/;
			}
		}
		if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
		    $line !~ /for\s*\(.*;\s+\)/ &&
		    $line !~ /:\s+\)/) {
			if (ERROR("SPACING",
				  "space prohibited before that close parenthesis ')'\n" . $herecurr) &&
			    $fix) {
				$fixed[$fixlinenr] =~
				    s/\s+\)/\)/;
			}
		}

# check unnecessary parentheses around addressof/dereference single $Lvals
# ie: &(foo->bar) should be &foo->bar and *(foo->bar) should be *foo->bar

		while ($line =~ /(?:[^&]&\s*|\*)\(\s*($Ident\s*(?:$Member\s*)+)\s*\)/g) {
			my $var = $1;
			if (CHK("UNNECESSARY_PARENTHESES",
				"Unnecessary parentheses around $var\n" . $herecurr) &&
			    $fix) {
				$fixed[$fixlinenr] =~ s/\(\s*\Q$var\E\s*\)/$var/;
			}
		}

# check for unnecessary parentheses around function pointer uses
# ie: (foo->bar)(); should be foo->bar();
# but not "if (foo->bar) (" to avoid some false positives
		if ($line =~ /(\bif\s*|)(\(\s*$Ident\s*(?:$Member\s*)+\))[ \t]*\(/ && $1 !~ /^if/) {
			my $var = $2;
			if (CHK("UNNECESSARY_PARENTHESES",
				"Unnecessary parentheses around function pointer $var\n" . $herecurr) &&
			    $fix) {
				my $var2 = deparenthesize($var);
				$var2 =~ s/\s//g;
				$fixed[$fixlinenr] =~ s/\Q$var\E/$var2/;
			}
		}

#goto labels aren't indented, allow a single space however
		if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
		   !($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
			if (WARN("INDENTED_LABEL",
				 "labels should not be indented\n" . $herecurr) &&
			    $fix) {
				$fixed[$fixlinenr] =~
				    s/^(.)\s+/$1/;
			}
		}

# return is not a function
		if (defined($stat) && $stat =~ /^.\s*return(\s*)\(/s) {
			my $spacing = $1;
			if ($^V && $^V ge 5.10.0 &&
			    $stat =~ /^.\s*return\s*($balanced_parens)\s*;\s*$/) {
				my $value = $1;
				$value = deparenthesize($value);
				if ($value =~ m/^\s*$FuncArg\s*(?:\?|$)/) {
					ERROR("RETURN_PARENTHESES",
					      "return is not a function, parentheses are not required\n" . $herecurr);
				}
			} elsif ($spacing !~ /\s+/) {
				ERROR("SPACING",
				      "space required before the open parenthesis '('\n" . $herecurr);
			}
		}

# unnecessary return in a void function
# at end-of-function, with the previous line a single leading tab, then return;
# and the line before that not a goto label target like "out:"
		if ($sline =~ /^[ \+]}\s*$/ &&
		    $prevline =~ /^\+\treturn\s*;\s*$/ &&
		    $linenr >= 3 &&
		    $lines[$linenr - 3] =~ /^[ +]/ &&
		    $lines[$linenr - 3] !~ /^[ +]\s*$Ident\s*:/) {
			WARN("RETURN_VOID",
			     "void function return statements are not generally useful\n" . $hereprev);
               }

# if statements using unnecessary parentheses - ie: if ((foo == bar))
		if ($^V && $^V ge 5.10.0 &&
		    $line =~ /\bif\s*((?:\(\s*){2,})/) {
			my $openparens = $1;
			my $count = $openparens =~ tr@\(@\(@;
			my $msg = "";
			if ($line =~ /\bif\s*(?:\(\s*){$count,$count}$LvalOrFunc\s*($Compare)\s*$LvalOrFunc(?:\s*\)){$count,$count}/) {
				my $comp = $4;	#Not $1 because of $LvalOrFunc
				$msg = " - maybe == should be = ?" if ($comp eq "==");
				WARN("UNNECESSARY_PARENTHESES",
				     "Unnecessary parentheses$msg\n" . $herecurr);
			}
		}

# comparisons with a constant or upper case identifier on the left
#	avoid cases like "foo + BAR < baz"
#	only fix matches surrounded by parentheses to avoid incorrect
#	conversions like "FOO < baz() + 5" being "misfixed" to "baz() > FOO + 5"
		if ($^V && $^V ge 5.10.0 &&
		    $line =~ /^\+(.*)\b($Constant|[A-Z_][A-Z0-9_]*)\s*($Compare)\s*($LvalOrFunc)/) {
			my $lead = $1;
			my $const = $2;
			my $comp = $3;
			my $to = $4;
			my $newcomp = $comp;
			if ($lead !~ /(?:$Operators|\.)\s*$/ &&
			    $to !~ /^(?:Constant|[A-Z_][A-Z0-9_]*)$/ &&
			    WARN("CONSTANT_COMPARISON",
				 "Comparisons should place the constant on the right side of the test\n" . $herecurr) &&
			    $fix) {
				if ($comp eq "<") {
					$newcomp = ">";
				} elsif ($comp eq "<=") {
					$newcomp = ">=";
				} elsif ($comp eq ">") {
					$newcomp = "<";
				} elsif ($comp eq ">=") {
					$newcomp = "<=";
				}
				$fixed[$fixlinenr] =~ s/\(\s*\Q$const\E\s*$Compare\s*\Q$to\E\s*\)/($to $newcomp $const)/;
			}
		}

# Return of what appears to be an errno should normally be negative
		if ($sline =~ /\breturn(?:\s*\(+\s*|\s+)(E[A-Z]+)(?:\s*\)+\s*|\s*)[;:,]/) {
			my $name = $1;
			if ($name ne 'EOF' && $name ne 'ERROR') {
				WARN("USE_NEGATIVE_ERRNO",
				     "return of an errno should typically be negative (ie: return -$1)\n" . $herecurr);
			}
		}

# Need a space before open parenthesis after if, while etc
		if ($line =~ /\b(if|while|for|switch)\(/) {
			if (ERROR("SPACING",
				  "space required before the open parenthesis '('\n" . $herecurr) &&
			    $fix) {
				$fixed[$fixlinenr] =~
				    s/\b(if|while|for|switch)\(/$1 \(/;
			}
		}

# Check for illegal assignment in if conditional -- and check for trailing
# statements after the conditional.
		if ($line =~ /do\s*(?!{)/) {
			($stat, $cond, $line_nr_next, $remain_next, $off_next) =
				ctx_statement_block($linenr, $realcnt, 0)
					if (!defined $stat);
			my ($stat_next) = ctx_statement_block($line_nr_next,
						$remain_next, $off_next);
			$stat_next =~ s/\n./\n /g;
			##print "stat<$stat> stat_next<$stat_next>\n";

			if ($stat_next =~ /^\s*while\b/) {
				# If the statement carries leading newlines,
				# then count those as offsets.
				my ($whitespace) =
					($stat_next =~ /^((?:\s*\n[+-])*\s*)/s);
				my $offset =
					statement_rawlines($whitespace) - 1;

				$suppress_whiletrailers{$line_nr_next +
								$offset} = 1;
			}
		}
		if (!defined $suppress_whiletrailers{$linenr} &&
		    defined($stat) && defined($cond) &&
		    $line =~ /\b(?:if|while|for)\s*\(/ && $line !~ /^.\s*#/) {
			my ($s, $c) = ($stat, $cond);

			if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/s) {
				ERROR("ASSIGN_IN_IF",
				      "do not use assignment in if condition\n" . $herecurr);
			}

			# Find out what is on the end of the line after the
			# conditional.
			substr($s, 0, length($c), '');
			$s =~ s/\n.*//g;
			$s =~ s/$;//g; 	# Remove any comments
			if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ &&
			    $c !~ /}\s*while\s*/)
			{
				# Find out how long the conditional actually is.
				my @newlines = ($c =~ /\n/gs);
				my $cond_lines = 1 + $#newlines;
				my $stat_real = '';

				$stat_real = raw_line($linenr, $cond_lines)
							. "\n" if ($cond_lines);
				if (defined($stat_real) && $cond_lines > 1) {
					$stat_real = "[...]\n$stat_real";
				}

				ERROR("TRAILING_STATEMENTS",
				      "trailing statements should be on next line\n" . $herecurr . $stat_real);
			}
		}

# Check for bitwise tests written as boolean
		if ($line =~ /
			(?:
				(?:\[|\(|\&\&|\|\|)
				\s*0[xX][0-9]+\s*
				(?:\&\&|\|\|)
			|
				(?:\&\&|\|\|)
				\s*0[xX][0-9]+\s*
				(?:\&\&|\|\||\)|\])
			)/x)
		{
			WARN("HEXADECIMAL_BOOLEAN_TEST",
			     "boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . $herecurr);
		}

# if and else should not have general statements after it
		if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) {
			my $s = $1;
			$s =~ s/$;//g; 	# Remove any comments
			if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) {
				ERROR("TRAILING_STATEMENTS",
				      "trailing statements should be on next line\n" . $herecurr);
			}
		}
# if should not continue a brace
		if ($line =~ /}\s*if\b/) {
			ERROR("TRAILING_STATEMENTS",
			      "trailing statements should be on next line (or did you mean 'else if'?)\n" .
				$herecurr);
		}
# case and default should not have general statements after them
		if ($line =~ /^.\s*(?:case\s*.*|default\s*):/g &&
		    $line !~ /\G(?:
			(?:\s*$;*)(?:\s*{)?(?:\s*$;*)(?:\s*\\)?\s*$|
			\s*return\s+
		    )/xg)
		{
			ERROR("TRAILING_STATEMENTS",
			      "trailing statements should be on next line\n" . $herecurr);
		}

		# Check for }<nl>else {, these must be at the same
		# indent level to be relevant to each other.
		if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ &&
		    $previndent == $indent) {
			if (ERROR("ELSE_AFTER_BRACE",
				  "else should follow close brace '}'\n" . $hereprev) &&
			    $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
				fix_delete_line($fixlinenr - 1, $prevrawline);
				fix_delete_line($fixlinenr, $rawline);
				my $fixedline = $prevrawline;
				$fixedline =~ s/}\s*$//;
				if ($fixedline !~ /^\+\s*$/) {
					fix_insert_line($fixlinenr, $fixedline);
				}
				$fixedline = $rawline;
				$fixedline =~ s/^(.\s*)else/$1} else/;
				fix_insert_line($fixlinenr, $fixedline);
			}
		}

		if ($prevline=~/}\s*$/ and $line=~/^.\s*while\s*/ &&
		    $previndent == $indent) {
			my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);

			# Find out what is on the end of the line after the
			# conditional.
			substr($s, 0, length($c), '');
			$s =~ s/\n.*//g;

			if ($s =~ /^\s*;/) {
				if (ERROR("WHILE_AFTER_BRACE",
					  "while should follow close brace '}'\n" . $hereprev) &&
				    $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
					fix_delete_line($fixlinenr - 1, $prevrawline);
					fix_delete_line($fixlinenr, $rawline);
					my $fixedline = $prevrawline;
					my $trailing = $rawline;
					$trailing =~ s/^\+//;
					$trailing = trim($trailing);
					$fixedline =~ s/}\s*$/} $trailing/;
					fix_insert_line($fixlinenr, $fixedline);
				}
			}
		}

#Specific variable tests
		while ($line =~ m{($Constant|$Lval)}g) {
			my $var = $1;

#gcc binary extension
			if ($var =~ /^$Binary$/) {
				if (WARN("GCC_BINARY_CONSTANT",
					 "Avoid gcc v4.3+ binary constant extension: <$var>\n" . $herecurr) &&
				    $fix) {
					my $hexval = sprintf("0x%x", oct($var));
					$fixed[$fixlinenr] =~
					    s/\b$var\b/$hexval/;
				}
			}

#CamelCase
			if ($var !~ /^$Constant$/ &&
			    $var =~ /[A-Z][a-z]|[a-z][A-Z]/ &&
#Ignore Page<foo> variants
			    $var !~ /^(?:Clear|Set|TestClear|TestSet|)Page[A-Z]/ &&
#Ignore SI style variants like nS, mV and dB (ie: max_uV, regulator_min_uA_show)
			    $var !~ /^(?:[a-z_]*?)_?[a-z][A-Z](?:_[a-z_]+)?$/ &&
#Ignore some three character SI units explicitly, like MiB and KHz
			    $var !~ /^(?:[a-z_]*?)_?(?:[KMGT]iB|[KMGT]?Hz)(?:_[a-z_]+)?$/) {
				while ($var =~ m{($Ident)}g) {
					my $word = $1;
					next if ($word !~ /[A-Z][a-z]|[a-z][A-Z]/);
					if ($check) {
						seed_camelcase_includes();
						if (!$file && !$camelcase_file_seeded) {
							seed_camelcase_file($realfile);
							$camelcase_file_seeded = 1;
						}
					}
					if (!defined $camelcase{$word}) {
						$camelcase{$word} = 1;
						CHK("CAMELCASE",
						    "Avoid CamelCase: <$word>\n" . $herecurr);
					}
				}
			}
		}

#no spaces allowed after \ in define
		if ($line =~ /\#\s*define.*\\\s+$/) {
			if (WARN("WHITESPACE_AFTER_LINE_CONTINUATION",
				 "Whitespace after \\ makes next lines useless\n" . $herecurr) &&
			    $fix) {
				$fixed[$fixlinenr] =~ s/\s+$//;
			}
		}

# warn if <asm/foo.h> is #included and <linux/foo.h> is available and includes
# itself <asm/foo.h> (uses RAW line)
		if ($tree && $rawline =~ m{^.\s*\#\s*include\s*\<asm\/(.*)\.h\>}) {
			my $file = "$1.h";
			my $checkfile = "include/linux/$file";
			if (-f "$root/$checkfile" &&
			    $realfile ne $checkfile &&
			    $1 !~ /$allowed_asm_includes/)
			{
				my $asminclude = `grep -Ec "#include\\s+<asm/$file>" $root/$checkfile`;
				if ($asminclude > 0) {
					if ($realfile =~ m{^arch/}) {
						CHK("ARCH_INCLUDE_LINUX",
						    "Consider using #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
					} else {
						WARN("INCLUDE_LINUX",
						     "Use #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
					}
				}
			}
		}

# multi-statement macros should be enclosed in a do while loop, grab the
# first statement and ensure its the whole macro if its not enclosed
# in a known good container
		if ($realfile !~ m@/vmlinux.lds.h$@ &&
		    $line =~ /^.\s*\#\s*define\s*$Ident(\()?/) {
			my $ln = $linenr;
			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 =~ /\#\#/ && $ctx !~ /\#\#\s*(?:__VA_ARGS__|args)\b/);

			$dstat =~ s/^.\s*\#\s*define\s+$Ident(\([^\)]*\))?\s*//;
			my $define_args = $1;
			my $define_stmt = $dstat;
			my @def_args = ();

			if (defined $define_args && $define_args ne "") {
				$define_args = substr($define_args, 1, length($define_args) - 2);
				$define_args =~ s/\s*//g;
				@def_args = split(",", $define_args);
			}

			$dstat =~ s/$;//g;
			$dstat =~ s/\\\n.//g;
			$dstat =~ s/^\s*//s;
			$dstat =~ s/\s*$//s;

			# Flatten any parentheses and braces
			while ($dstat =~ s/\([^\(\)]*\)/1/ ||
			       $dstat =~ s/\{[^\{\}]*\}/1/ ||
			       $dstat =~ s/.\[[^\[\]]*\]/1/)
			{
			}

			# Flatten any obvious string concatentation.
			while ($dstat =~ s/($String)\s*$Ident/$1/ ||
			       $dstat =~ s/$Ident\s*($String)/$1/)
			{
			}

			# Make asm volatile uses seem like a generic function
			$dstat =~ s/\b_*asm_*\s+_*volatile_*\b/asm_volatile/g;

			my $exceptions = qr{
				$Declare|
				module_param_named|
				MODULE_PARM_DESC|
				DECLARE_PER_CPU|
				DEFINE_PER_CPU|
				__typeof__\(|
				union|
				struct|
				\.$Ident\s*=\s*|
				^\"|\"$|
				^\[
			}x;
			#print "REST<$rest> dstat<$dstat> ctx<$ctx>\n";

			$ctx =~ s/\n*$//;
			my $herectx = $here . "\n";
			my $stmt_cnt = statement_rawlines($ctx);

			for (my $n = 0; $n < $stmt_cnt; $n++) {
				$herectx .= raw_line($linenr, $n) . "\n";
			}

			if ($dstat ne '' &&
			    $dstat !~ /^(?:$Ident|-?$Constant),$/ &&			# 10, // foo(),
			    $dstat !~ /^(?:$Ident|-?$Constant);$/ &&			# foo();
			    $dstat !~ /^[!~-]?(?:$Lval|$Constant)$/ &&		# 10 // foo() // !foo // ~foo // -foo // foo->bar // foo.bar->baz
			    $dstat !~ /^'X'$/ && $dstat !~ /^'XX'$/ &&			# character constants
			    $dstat !~ /$exceptions/ &&
			    $dstat !~ /^\.$Ident\s*=/ &&				# .foo =
			    $dstat !~ /^(?:\#\s*$Ident|\#\s*$Constant)\s*$/ &&		# stringification #foo
			    $dstat !~ /^do\s*$Constant\s*while\s*$Constant;?$/ &&	# do {...} while (...); // do {...} while (...)
			    $dstat !~ /^for\s*$Constant$/ &&				# for (...)
			    $dstat !~ /^for\s*$Constant\s+(?:$Ident|-?$Constant)$/ &&	# for (...) bar()
			    $dstat !~ /^do\s*{/ &&					# do {...
			    $dstat !~ /^\(\{/ &&						# ({...
			    $ctx !~ /^.\s*#\s*define\s+TRACE_(?:SYSTEM|INCLUDE_FILE|INCLUDE_PATH)\b/)
			{
				if ($dstat =~ /^\s*if\b/) {
					ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
					      "Macros starting with if should be enclosed by a do - while loop to avoid possible if/else logic defects\n" . "$herectx");
				} elsif ($dstat =~ /;/) {
					ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
					      "Macros with multiple statements should be enclosed in a do - while loop\n" . "$herectx");
				} else {
					ERROR("COMPLEX_MACRO",
					      "Macros with complex values should be enclosed in parentheses\n" . "$herectx");
				}

			}

			# Make $define_stmt single line, comment-free, etc
			my @stmt_array = split('\n', $define_stmt);
			my $first = 1;
			$define_stmt = "";
			foreach my $l (@stmt_array) {
				$l =~ s/\\$//;
				if ($first) {
					$define_stmt = $l;
					$first = 0;
				} elsif ($l =~ /^[\+ ]/) {
					$define_stmt .= substr($l, 1);
				}
			}
			$define_stmt =~ s/$;//g;
			$define_stmt =~ s/\s+/ /g;
			$define_stmt = trim($define_stmt);

# check if any macro arguments are reused (ignore '...' and 'type')
			foreach my $arg (@def_args) {
			        next if ($arg =~ /\.\.\./);
			        next if ($arg =~ /^type$/i);
				my $tmp_stmt = $define_stmt;
				$tmp_stmt =~ s/\b(typeof|__typeof__|__builtin\w+|typecheck\s*\(\s*$Type\s*,|\#+)\s*\(*\s*$arg\s*\)*\b//g;
				$tmp_stmt =~ s/\#+\s*$arg\b//g;
				$tmp_stmt =~ s/\b$arg\s*\#\#//g;
				my $use_cnt = $tmp_stmt =~ s/\b$arg\b//g;
				if ($use_cnt > 1) {
					CHK("MACRO_ARG_REUSE",
					    "Macro argument reuse '$arg' - possible side-effects?\n" . "$herectx");
				    }
# check if any macro arguments may have other precedence issues
				if ($tmp_stmt =~ m/($Operators)?\s*\b$arg\b\s*($Operators)?/m &&
				    ((defined($1) && $1 ne ',') ||
				     (defined($2) && $2 ne ','))) {
					CHK("MACRO_ARG_PRECEDENCE",
					    "Macro argument '$arg' may be better as '($arg)' to avoid precedence issues\n" . "$herectx");
				}
			}

# 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 {
			if ($prevline !~ /^..*\\$/ &&
			    $line !~ /^\+\s*\#.*\\$/ &&		# preprocessor
			    $line !~ /^\+.*\b(__asm__|asm)\b.*\\$/ &&	# asm
			    $line =~ /^\+.*\\$/) {
				WARN("LINE_CONTINUATIONS",
				     "Avoid unnecessary line continuations\n" . $herecurr);
			}
		}

# do {} while (0) macro tests:
# single-statement macros do not need to be enclosed in do while (0) loop,
# macro should not end with a semicolon
		if ($^V && $^V ge 5.10.0 &&
		    $realfile !~ m@/vmlinux.lds.h$@ &&
		    $line =~ /^.\s*\#\s*define\s+$Ident(\()?/) {
			my $ln = $linenr;
			my $cnt = $realcnt;
			my ($off, $dstat, $dcond, $rest);
			my $ctx = '';
			($dstat, $dcond, $ln, $cnt, $off) =
				ctx_statement_block($linenr, $realcnt, 0);
			$ctx = $dstat;

			$dstat =~ s/\\\n.//g;