Subject: + checkpatch-warn-when-using-gccs-binary-constant-extension.patch added to -mm tree
To: joe@xxxxxxxxxxx,akpm@xxxxxxxxxxxxxxxxxxxx,apw@xxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Wed, 22 May 2013 15:27:44 -0700
The patch titled
Subject: checkpatch: warn when using gcc's binary constant ("0b") extension
has been added to the -mm tree. Its filename is
checkpatch-warn-when-using-gccs-binary-constant-extension.patch
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From: Joe Perches <joe@xxxxxxxxxxx>
Subject: checkpatch: warn when using gcc's binary constant ("0b") extension
The gcc extension for binary constants that start with 0b is only
supported with gcc version 4.3 or higher.
The kernel can still be compiled with earlier versions of gcc, so have
checkpatch emit a warning for these constants.
Restructure checkpatch's constant finding code a bit to support finding
these binary constants.
Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
Suggested-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Andy Whitcroft <apw@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/checkpatch.pl | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff -puN scripts/checkpatch.pl~checkpatch-warn-when-using-gccs-binary-constant-extension scripts/checkpatch.pl
--- a/scripts/checkpatch.pl~checkpatch-warn-when-using-gccs-binary-constant-extension
+++ a/scripts/checkpatch.pl
@@ -230,11 +230,15 @@ our $Inline = qr{inline|__always_inline|
our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
our $Lval = qr{$Ident(?:$Member)*};
+our $Int_type = qr{(?i)llu|ull|ll|lu|ul|l|u};
+our $Binary = qr{(?i)0b[01]+$Int_type?};
+our $Hex = qr{(?i)0x[0-9a-f]+$Int_type?};
+our $Int = qr{[0-9]+$Int_type?};
our $Float_hex = qr{(?i)0x[0-9a-f]+p-?[0-9]+[fl]?};
our $Float_dec = qr{(?i)(?:[0-9]+\.[0-9]*|[0-9]*\.[0-9]+)(?:e-?[0-9]+)?[fl]?};
our $Float_int = qr{(?i)[0-9]+e-?[0-9]+[fl]?};
our $Float = qr{$Float_hex|$Float_dec|$Float_int};
-our $Constant = qr{$Float|(?i)(?:0x[0-9a-f]+|[0-9]+)[ul]*};
+our $Constant = qr{$Float|$Binary|$Hex|$Int};
our $Assignment = qr{\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=};
our $Compare = qr{<=|>=|==|!=|<|>};
our $Operators = qr{
@@ -2934,9 +2938,17 @@ sub process {
}
}
-#CamelCase
+#Specific variable tests
while ($line =~ m{($Constant|$Lval)}g) {
my $var = $1;
+
+#gcc binary extension
+ if ($var =~ /^$Binary$/) {
+ WARN("GCC_BINARY_CONSTANT",
+ "Avoid gcc v4.3+ binary constant extension: <$var>\n" . $herecurr);
+ }
+
+#CamelCase
if ($var !~ /$Constant/ &&
$var =~ /[A-Z][a-z]|[a-z][A-Z]/ &&
$var !~ /"^(?:Clear|Set|TestClear|TestSet|)Page[A-Z]/ &&
_
Patches currently in -mm which might be from joe@xxxxxxxxxxx are
linux-next.patch
lib-bitmapc-speed-up-bitmap_find_free_region.patch
lib-bitmapc-speed-up-bitmap_find_free_region-fix.patch
checkpatch-change-camelcase-test-and-make-it-strict.patch
checkpatch-warn-when-using-gccs-binary-constant-extension.patch
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