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checkpatch: Add --strict test for function pointer calling style 

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 <joe@perches.com>
Cc: Peter Hurley <peter@hurleysoftware.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 2014-12-10 15:51:51 -08:00 committed by Linus Torvalds
parent e0d975b1b4
commit ea4acbb11e
1 changed files with 21 additions and 3 deletions
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24
scripts/checkpatch.pl
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@ -3844,9 +3844,27 @@ 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