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checkpatch: improve TYPECAST_INT_CONSTANT test message

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Improve the TYPECAST_INT_CONSTANT test by showing the suggested conversion
for various type of uses like (unsigned int)1 to 1U.

Link: https://lkml.kernel.org/r/ecefe8dcb93fe7028311b69dd297ba52224233d4.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joe Perches
2021-02-25 17:21:54 -08:00
committed by Linus Torvalds
parent adb2da82fc
commit 0972b8bfe0
1 changed files with 10 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
scripts/checkpatch.pl
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@@ -6518,18 +6518,18 @@ sub process {
if ($line =~ /(\(\s*$C90_int_types\s*\)\s*)($Constant)\b/) { if ($line =~ /(\(\s*$C90_int_types\s*\)\s*)($Constant)\b/) {
my $cast = $1; my $cast = $1;
my $const = $2; my $const = $2;
my $suffix = "";
my $newconst = $const;
$newconst =~ s/${Int_type}$//;
$suffix .= 'U' if ($cast =~ /\bunsigned\b/);
if ($cast =~ /\blong\s+long\b/) {
$suffix .= 'LL';
} elsif ($cast =~ /\blong\b/) {
$suffix .= 'L';
}
if (WARN("TYPECAST_INT_CONSTANT", if (WARN("TYPECAST_INT_CONSTANT",
"Unnecessary typecast of c90 int constant\n" . $herecurr) && "Unnecessary typecast of c90 int constant - '$cast$const' could be '$const$suffix'\n" . $herecurr) &&
$fix) { $fix) {
my $suffix = "";
my $newconst = $const;
$newconst =~ s/${Int_type}$//;
$suffix .= 'U' if ($cast =~ /\bunsigned\b/);
if ($cast =~ /\blong\s+long\b/) {
$suffix .= 'LL';
} elsif ($cast =~ /\blong\b/) {
$suffix .= 'L';
}
$fixed[$fixlinenr] =~ s/\Q$cast\E$const\b/$newconst$suffix/; $fixed[$fixlinenr] =~ s/\Q$cast\E$const\b/$newconst$suffix/;
} }
} }