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checkpatch: improve macro reuse test

checkpatch reports a false positive when using token pasting argument multiple times in a macro. Fix it. Miscellanea: o Make the $tmp variable name used in the macro argument tests a bit more descriptive

Joe Perches committed 9 years ago

Commit 7fe528a1 parent 737c0761 file · +6 −6Browse files

Showing the changes to scripts/checkpatch.pl (1 of 1 file). Show all

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scripts/checkpatch.pl+6−6
@@ -4940,17 +4940,17 @@ sub process { · 4939 unmodified lines
49404940 foreach my $arg (@def_args) {
49414941 next if ($arg =~ /\.\.\./);
49424942 next if ($arg =~ /^type$/i);
4943− my $tmp = $define_stmt;
4944− $tmp =~ s/\b(typeof|__typeof__|__builtin\w+|typecheck\s*\(\s*$Type\s*,|\#+)\s*\(*\s*$arg\s*\)*\b//g;
4945− $tmp =~ s/\#+\s*$arg\b//g;
4946− $tmp =~ s/\b$arg\s*\#\#//g;
4947− my $use_cnt = $tmp =~ s/\b$arg\b//g;
4943+ my $tmp_stmt = $define_stmt;
4944+ $tmp_stmt =~ s/\b(typeof|__typeof__|__builtin\w+|typecheck\s*\(\s*$Type\s*,|\#+)\s*\(*\s*$arg\s*\)*\b//g;
4945+ $tmp_stmt =~ s/\#+\s*$arg\b//g;
4946+ $tmp_stmt =~ s/\b$arg\s*\#\#//g;
4947+ my $use_cnt = $tmp_stmt =~ s/\b$arg\b//g;
49484948 if ($use_cnt > 1) {
49494949 CHK("MACRO_ARG_REUSE",
49504950 "Macro argument reuse '$arg' - possible side-effects?\n" . "$herectx");
49514951 }
49524952 # check if any macro arguments may have other precedence issues
4953− if ($define_stmt =~ m/($Operators)?\s*\b$arg\b\s*($Operators)?/m &&
4953+ if ($tmp_stmt =~ m/($Operators)?\s*\b$arg\b\s*($Operators)?/m &&
49544954 ((defined($1) && $1 ne ',') ||
49554955 (defined($2) && $2 ne ','))) {
49564956 CHK("MACRO_ARG_PRECEDENCE",