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authorAlex Dowad <alexinbeijing@gmail.com>2015-06-25 15:02:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-06-25 17:00:41 -0700
commit485ff23ed2575e9d479f45227749cbbcd5df3e19 (patch)
tree99e68704fe96b71ad203164f651e92408454f9cd
parente6176fa4728fb6df4f66c3e9c08736c369e71f75 (diff)
checkpatch: make types found in a source file/patch local
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 $file2 the (spurious) "size" type detected in the first file will cause it to flag the second file for improper use of the pointer dereference operator. To fix this, store types and modifiers found in a file in separate arrays from built-in ones, and reset the arrays of types and modifiers found in files at the beginning of each new source file. Signed-off-by: Alex Dowad <alexinbeijing@gmail.com> Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rwxr-xr-xscripts/checkpatch.pl13
1 files changed, 9 insertions, 4 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index f7f222a1e908..e46414dce05f 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -423,6 +423,7 @@ our @typeList = (
qr{${Ident}_handler_fn},
@typeListMisordered,
);
+our @typeListFile = ();
our @typeListWithAttr = (
@typeList,
qr{struct\s+$InitAttribute\s+$Ident},
@@ -432,6 +433,7 @@ our @typeListWithAttr = (
our @modifierList = (
qr{fastcall},
);
+our @modifierListFile = ();
our @mode_permission_funcs = (
["module_param", 3],
@@ -515,8 +517,8 @@ if ($codespell) {
$misspellings = join("|", sort keys %spelling_fix) if keys %spelling_fix;
sub build_types {
- my $mods = "(?x: \n" . join("|\n ", @modifierList) . "\n)";
- my $all = "(?x: \n" . join("|\n ", @typeList) . "\n)";
+ my $mods = "(?x: \n" . join("|\n ", (@modifierList, @modifierListFile)) . "\n)";
+ my $all = "(?x: \n" . join("|\n ", (@typeList, @typeListFile)) . "\n)";
my $Misordered = "(?x: \n" . join("|\n ", @typeListMisordered) . "\n)";
my $allWithAttr = "(?x: \n" . join("|\n ", @typeListWithAttr) . "\n)";
$Modifier = qr{(?:$Attribute|$Sparse|$mods)};
@@ -748,6 +750,9 @@ for my $filename (@ARGV) {
@fixed_inserted = ();
@fixed_deleted = ();
$fixlinenr = -1;
+ @modifierListFile = ();
+ @typeListFile = ();
+ build_types();
}
exit($exit);
@@ -1612,13 +1617,13 @@ sub possible {
for my $modifier (split(' ', $possible)) {
if ($modifier !~ $notPermitted) {
warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible);
- push(@modifierList, $modifier);
+ push(@modifierListFile, $modifier);
}
}
} else {
warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible);
- push(@typeList, $possible);
+ push(@typeListFile, $possible);
}
build_types();
} else {