checkpatch uses various cues in its input patches and files to discover the names of user-defined types and modifiers. It then uses that information when processing expressions to discover potential style issues. Unfortunately, in rare cases, this means that checkpatch may give different results if you run it on several input files in one execution, or one by one! The reason is that it may identify a type (or something that looks like a type) in one file, and then carry this information over when processing a different file. For example, drivers/staging/media/bcm2048/radio-bcm2048.c contains this line (in a macro): size value; and drivers/staging/media/davinci_vpfe/vpfe_video.c has this line: while (size * *nbuffers > vpfe_dev->video_limit) If checkpatch processes these 2 files in a single command like: ./scripts/checkpatch.pl -f $file1 $file2 the (spurious) "size" type detected in the first file will cause it to flag the second file for improper use of the pointer dereference operator. To fix this, store types and modifiers found in a file in separate arrays from built-in ones, and reset the arrays of types and modifiers found in files at the beginning of each new source file.
Unified · Split
| @@ -423,6 +423,7 @@ our @typeList = ( · 422 unmodified lines | ||
| 423 | 423 | qr{${Ident}_handler_fn}, |
| 424 | 424 | @typeListMisordered, |
| 425 | 425 | ); |
| 426 | +our @typeListFile = (); | |
| 426 | 427 | our @typeListWithAttr = ( |
| 427 | 428 | @typeList, |
| 428 | 429 | qr{struct\s+$InitAttribute\s+$Ident}, |
| @@ -432,6 +433,7 @@ our @typeListWithAttr = ( · 3 unmodified lines | ||
| 432 | 433 | our @modifierList = ( |
| 433 | 434 | qr{fastcall}, |
| 434 | 435 | ); |
| 436 | +our @modifierListFile = (); | |
| 435 | 437 | |
| 436 | 438 | our @mode_permission_funcs = ( |
| 437 | 439 | ["module_param", 3], |
| @@ -515,8 +517,8 @@ if ($codespell) { · 77 unmodified lines | ||
| 515 | 517 | $misspellings = join("|", sort keys %spelling_fix) if keys %spelling_fix; |
| 516 | 518 | |
| 517 | 519 | sub build_types { |
| 518 | − my $mods = "(?x: \n" . join("|\n ", @modifierList) . "\n)"; | |
| 519 | − my $all = "(?x: \n" . join("|\n ", @typeList) . "\n)"; | |
| 520 | + my $mods = "(?x: \n" . join("|\n ", (@modifierList, @modifierListFile)) . "\n)"; | |
| 521 | + my $all = "(?x: \n" . join("|\n ", (@typeList, @typeListFile)) . "\n)"; | |
| 520 | 522 | my $Misordered = "(?x: \n" . join("|\n ", @typeListMisordered) . "\n)"; |
| 521 | 523 | my $allWithAttr = "(?x: \n" . join("|\n ", @typeListWithAttr) . "\n)"; |
| 522 | 524 | $Modifier = qr{(?:$Attribute|$Sparse|$mods)}; |
| @@ -748,6 +750,9 @@ for my $filename (@ARGV) { · 225 unmodified lines | ||
| 748 | 750 | @fixed_inserted = (); |
| 749 | 751 | @fixed_deleted = (); |
| 750 | 752 | $fixlinenr = -1; |
| 753 | + @modifierListFile = (); | |
| 754 | + @typeListFile = (); | |
| 755 | + build_types(); | |
| 751 | 756 | } |
| 752 | 757 | |
| 753 | 758 | exit($exit); |
| @@ -1612,13 +1617,13 @@ sub possible { · 858 unmodified lines | ||
| 1612 | 1617 | for my $modifier (split(' ', $possible)) { |
| 1613 | 1618 | if ($modifier !~ $notPermitted) { |
| 1614 | 1619 | warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible); |
| 1615 | − push(@modifierList, $modifier); | |
| 1620 | + push(@modifierListFile, $modifier); | |
| 1616 | 1621 | } |
| 1617 | 1622 | } |
| 1618 | 1623 | |
| 1619 | 1624 | } else { |
| 1620 | 1625 | warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible); |
| 1621 | − push(@typeList, $possible); | |
| 1626 | + push(@typeListFile, $possible); | |
| 1622 | 1627 | } |
| 1623 | 1628 | build_types(); |
| 1624 | 1629 | } else { |