diff options
| author | Joe Perches <joe@perches.com> | 2016-10-11 13:52:14 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-11 15:06:31 -0700 |
| commit | 5207649b7b1d2b1e1f8c97df91debfaa8de37669 (patch) | |
| tree | 2c8d7797f4e5d5583536d9d3e05e1ae98a8bec83 /scripts | |
| parent | 9192d41a3f0b98844860f1de5b82f729bbe07c61 (diff) | |
| download | lwn-5207649b7b1d2b1e1f8c97df91debfaa8de37669.tar.gz lwn-5207649b7b1d2b1e1f8c97df91debfaa8de37669.zip | |
checkpatch: improve MACRO_ARG_PRECEDENCE test
It is possible for a multiple line macro definition to have a false positive
report when an argument is used on a line after a continuation \.
This line might have a leading '+' as the initial character that could be
confused by checkpatch as an operator.
Avoid the leading character on multiple line macro definitions.
Link: http://lkml.kernel.org/r/60229d13399f9b6509db5a32e30d4c16951a60cd.1473836073.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/checkpatch.pl | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index ea1a7adce406..0ef3d837f2aa 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -4833,13 +4833,31 @@ sub process { } } + + # Make $define_stmt single line, comment-free, etc + my @stmt_array = split('\n', $define_stmt); + my $first = 1; + $define_stmt = ""; + foreach my $l (@stmt_array) { + $l =~ s/\\$//; + if ($first) { + $define_stmt = $l; + $first = 0; + } elsif ($l =~ /^[\+ ]/) { + $define_stmt .= substr($l, 1); + } + } + $define_stmt =~ s/$;//g; + $define_stmt =~ s/\s+/ /g; + $define_stmt = trim($define_stmt); + # check if any macro arguments are reused (ignore '...' and 'type') foreach my $arg (@def_args) { next if ($arg =~ /\.\.\./); next if ($arg =~ /^type$/i); my $tmp = $define_stmt; $tmp =~ s/\b(typeof|__typeof__|__builtin\w+|typecheck\s*\(\s*$Type\s*,|\#+)\s*\(*\s*$arg\s*\)*\b//g; - $tmp =~ s/\#\s*$arg\b//g; + $tmp =~ s/\#+\s*$arg\b//g; $tmp =~ s/\b$arg\s*\#\#//g; my $use_cnt = $tmp =~ s/\b$arg\b//g; if ($use_cnt > 1) { |