diff options
| -rwxr-xr-x | scripts/checkpatch.pl | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 40b0627aeb5e..913d6bdfdda3 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -2988,6 +2988,45 @@ sub process { } } +# do {} while (0) macro tests: +# single-statement macros do not need to be enclosed in do while (0) loop, +# macro should not end with a semicolon + if ($^V && $^V ge 5.10.0 && + $realfile !~ m@/vmlinux.lds.h$@ && + $line =~ /^.\s*\#\s*define\s+$Ident(\()?/) { + my $ln = $linenr; + my $cnt = $realcnt; + my ($off, $dstat, $dcond, $rest); + my $ctx = ''; + ($dstat, $dcond, $ln, $cnt, $off) = + ctx_statement_block($linenr, $realcnt, 0); + $ctx = $dstat; + + $dstat =~ s/\\\n.//g; + + if ($dstat =~ /^\+\s*#\s*define\s+$Ident\s*${balanced_parens}\s*do\s*{(.*)\s*}\s*while\s*\(\s*0\s*\)\s*([;\s]*)\s*$/) { + my $stmts = $2; + my $semis = $3; + + $ctx =~ s/\n*$//; + my $cnt = statement_rawlines($ctx); + my $herectx = $here . "\n"; + + for (my $n = 0; $n < $cnt; $n++) { + $herectx .= raw_line($linenr, $n) . "\n"; + } + + if (($stmts =~ tr/;/;/) == 1) { + WARN("SINGLE_STATEMENT_DO_WHILE_MACRO", + "Single statement macros should not use a do {} while (0) loop\n" . "$herectx"); + } + if (defined $semis && $semis ne "") { + WARN("DO_WHILE_MACRO_WITH_TRAILING_SEMICOLON", + "do {} while (0) macros should not be semicolon terminated\n" . "$herectx"); + } + } + } + # make sure symbols are always wrapped with VMLINUX_SYMBOL() ... # all assignments may have only one of the following with an assignment: # . |