Peter Hurley wrote:
The use of older function ptr calling style, (*fn)(), makes static
analysis more error-prone; replace with modern fn() style.
So make checkpatch emit a --strict test for that condition.
Update the unnecessary parentheses test for dereferencing
objects at the same time and create a $fix mechanism too.
Signed-off-by: Joe Perches <j...@perches.com>
---
scripts/checkpatch.pl | 24 +++++++++++++++++++++---
1 file changed, 21 insertions(+), 3 deletions(-)
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 24d6702..552e5dd 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3838,9 +3838,27 @@ sub process {
# ie: &(foo->bar) should be &foo->bar and *(foo->bar) should be *foo->bar
while ($line =~
/(?:[^&]&\s*|\*)\(\s*($Ident\s*(?:$Member\s*)+)\s*\)/g) {
- CHK("UNNECESSARY_PARENTHESES",
- "Unnecessary parentheses around $1\n" . $herecurr);
- }
+ my $var = $1;
+ if (CHK("UNNECESSARY_PARENTHESES",
+ "Unnecessary parentheses around $var\n" .
$herecurr) &&
+ $fix) {
+ $fixed[$fixlinenr] =~
s/\(\s*\Q$var\E\s*\)/$var/;
+ }
+ }
+
+# check for unnecessary parentheses around function pointer uses
+# ie: (foo->bar)(); should be foo->bar();
+# but not "if (foo->bar) (" to avoid some false positives
+ if ($line =~ /(\bif\s*|)(\(\s*$Ident\s*(?:$Member\s*)+\))[
\t]*\(/ && $1 !~ /^if/) {
+ my $var = $2;
+ if (CHK("UNNECESSARY_PARENTHESES",
+ "Unnecessary parentheses around function
pointer $var\n" . $herecurr) &&
+ $fix) {
+ my $var2 = deparenthesize($var);
+ $var2 =~ s/\s//g;
+ $fixed[$fixlinenr] =~ s/\Q$var\E/$var2/;
+ }
+ }
#goto labels aren't indented, allow a single space however
if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
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