>>> +# nested likely/unlikely calls
>>> + if ($line =~ /\b(?:(?:un)?likely)\s*\(\s*!?\s*(IS_ERR(?:_OR_NULL|_VALUE)?|WARN)/) {
>>> + WARN("LIKELY_MISUSE",
>>
>> How do you think about to use the specification “(?:IS_ERR(?:_(?:OR_NULL|VALUE))?|WARN)”
>> in this regular expression?
…
> IS_ERR
> (?:_ <- Another atomic group just to show that '_' is a common prefix?
Yes. - I hope that this specification detail can help a bit.
> Usually, Perl interpreter is very good at optimizing such things.
Would you like to help this software component by omitting a pair of
non-capturing parentheses at the beginning?
\b(?:un)?likely\s*
Regards,
Markus
