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checkpatch: warn on unnecessary int declarations

On Sun, 2018-08-05 at 08:52 -0700, Linus Torvalds wrote: > "long unsigned int" isn't _technically_ wrong. But we normally > call that type "unsigned long". So add a checkpatch test for it.

Joe Perches committed 8 years ago

Commit 809e0821 parent 6ad724e1 file · +20 −0Browse files

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scripts/checkpatch.pl+20−0
@@ -3829,6 +3829,26 @@ sub process { · 3828 unmodified lines
38293829 "type '$tmp' should be specified in [[un]signed] [short|int|long|long long] order\n" . $herecurr);
38303830 }
38313831
3832+# check for unnecessary <signed> int declarations of short/long/long long
3833+ while ($sline =~ m{\b($TypeMisordered(\s*\*)*|$C90_int_types)\b}g) {
3834+ my $type = trim($1);
3835+ next if ($type !~ /\bint\b/);
3836+ next if ($type !~ /\b(?:short|long\s+long|long)\b/);
3837+ my $new_type = $type;
3838+ $new_type =~ s/\b\s*int\s*\b/ /;
3839+ $new_type =~ s/\b\s*(?:un)?signed\b\s*/ /;
3840+ $new_type =~ s/^const\s+//;
3841+ $new_type = "unsigned $new_type" if ($type =~ /\bunsigned\b/);
3842+ $new_type = "const $new_type" if ($type =~ /^const\b/);
3843+ $new_type =~ s/\s+/ /g;
3844+ $new_type = trim($new_type);
3845+ if (WARN("UNNECESSARY_INT",
3846+ "Prefer '$new_type' over '$type' as the int is unnecessary\n" . $herecurr) &&
3847+ $fix) {
3848+ $fixed[$fixlinenr] =~ s/\b\Q$type\E\b/$new_type/;
3849+ }
3850+ }
3851+
38323852 # check for static const char * arrays.
38333853 if ($line =~ /\bstatic\s+const\s+char\s*\*\s*(\w+)\s*\[\s*\]\s*=\s*/) {
38343854 WARN("STATIC_CONST_CHAR_ARRAY",