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Date: Thu, 17 Jul 2014 08:52:03 -0700 From: Joe Perches <joe@...ches.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Andy Whitcroft <apw@...onical.com>, Hartley Sweeten <HartleyS@...ionengravers.com>, linux-kernel@...r.kernel.org Subject: [PATCH 3/3] checkpatch: Add test for native c90 types in unusual order c90 section "6.7.2 Type Specifiers" says: "type specifiers may occur in any order" That means that: short int is the same as int short unsigned short int is the same as int unsigned short etc... checkpatch currently parses only a subset of these allowed types. For instance: "unsigned short" and "signed short" are found by checkpatch as a specific type, but none of the or "int short" or "int signed short" variants are found. Add another table for the "kernel style misordered" variants. Add this misordered table to the findable types. Warn when the misordered style is used. This improves the "Missing a blank line after declarations" test as it depends on the correct parsing of the $Declare variable which looks for "$Type $Ident;" (ie: declarations like "int foo;"). Signed-off-by: Joe Perches <joe@...ches.com> --- scripts/checkpatch.pl | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 1bfe2fc..d21b890 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -309,9 +309,12 @@ our $Operators = qr{ our $c90_Keywords = qr{do|for|while|if|else|return|goto|continue|switch|default|case|break}x; our $NonptrType; +our $NonptrTypeMisordered; our $NonptrTypeWithAttr; our $Type; +our $TypeMisordered; our $Declare; +our $DeclareMisordered; our $NON_ASCII_UTF8 = qr{ [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte @@ -353,6 +356,25 @@ our $signature_tags = qr{(?xi: Cc: )}; +our @typeListMisordered = ( + qr{char\s+(?:un)?signed}, + qr{int\s+(?:(?:un)?signed\s+)?short\s}, + qr{int\s+short(?:\s+(?:un)?signed)}, + qr{short\s+int(?:\s+(?:un)?signed)}, + qr{(?:un)?signed\s+int\s+short}, + qr{short\s+(?:un)?signed}, + qr{long\s+int\s+(?:un)?signed}, + qr{int\s+long\s+(?:un)?signed}, + qr{long\s+(?:un)?signed\s+int}, + qr{int\s+(?:un)?signed\s+long}, + qr{int\s+(?:un)?signed}, + qr{int\s+long\s+long\s+(?:un)?signed}, + qr{long\s+long\s+int\s+(?:un)?signed}, + qr{long\s+long\s+(?:un)?signed\s+int}, + qr{long\s+long\s+(?:un)?signed}, + qr{long\s+(?:un)?signed}, +); + our @typeList = ( qr{void}, qr{(?:(?:un)?signed\s+)?char}, @@ -373,6 +395,7 @@ our @typeList = ( qr{${Ident}_t}, qr{${Ident}_handler}, qr{${Ident}_handler_fn}, + @typeListMisordered, ); our @typeListWithAttr = ( @typeList, @@ -414,6 +437,7 @@ our $allowed_asm_includes = qr{(?x: sub build_types { my $mods = "(?x: \n" . join("|\n ", @modifierList) . "\n)"; my $all = "(?x: \n" . join("|\n ", @typeList) . "\n)"; + my $Misordered = "(?x: \n" . join("|\n ", @typeListMisordered) . "\n)"; my $allWithAttr = "(?x: \n" . join("|\n ", @typeListWithAttr) . "\n)"; $Modifier = qr{(?:$Attribute|$Sparse|$mods)}; $NonptrType = qr{ @@ -425,6 +449,13 @@ sub build_types { ) (?:\s+$Modifier|\s+const)* }x; + $NonptrTypeMisordered = qr{ + (?:$Modifier\s+|const\s+)* + (?: + (?:${Misordered}\b) + ) + (?:\s+$Modifier|\s+const)* + }x; $NonptrTypeWithAttr = qr{ (?:$Modifier\s+|const\s+)* (?: @@ -439,7 +470,13 @@ sub build_types { (?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+)? (?:\s+$Inline|\s+$Modifier)* }x; + $TypeMisordered = qr{ + $NonptrTypeMisordered + (?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+)? + (?:\s+$Inline|\s+$Modifier)* + }x; $Declare = qr{(?:$Storage\s+(?:$Inline\s+)?)?$Type}; + $DeclareMisordered = qr{(?:$Storage\s+(?:$Inline\s+)?)?$TypeMisordered}; } build_types(); @@ -2994,6 +3031,13 @@ sub process { } } +# check for misordered declarations of char/short/int/long with signed/unsigned + while ($sline =~ m{(\b$TypeMisordered\b)}g) { + my $tmp = trim($1); + WARN("MISORDERED_TYPE", + "type '$tmp' should be specified in [[un]signed] [short|int|long|long long] order\n" . $herecurr); + } + # check for static const char * arrays. if ($line =~ /\bstatic\s+const\s+char\s*\*\s*(\w+)\s*\[\s*\]\s*=\s*/) { WARN("STATIC_CONST_CHAR_ARRAY", -- 1.8.1.2.459.gbcd45b4.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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