checkpatch: warn on embedded function names
Embedded function names are less appropriate to use when refactoring can
cause function renaming. Prefer the use of "%s", __func__ to embedded
function names.
Link: http://lkml.kernel.org/r/ac9631fdbac5af3507c5bfe88ad9064f0ed764ec.1483510416.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 982c52c..4f53093 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2134,7 +2134,7 @@
my $in_header_lines = $file ? 0 : 1;
my $in_commit_log = 0; #Scanning lines before patch
my $has_commit_log = 0; #Encountered lines before patch
- my $commit_log_possible_stack_dump = 0;
+ my $commit_log_possible_stack_dump = 0;
my $commit_log_long_line = 0;
my $commit_log_has_diff = 0;
my $reported_maintainer_file = 0;
@@ -2154,6 +2154,7 @@
my $realline = 0;
my $realcnt = 0;
my $here = '';
+ my $context_function; #undef'd unless there's a known function
my $in_comment = 0;
my $comment_edge = 0;
my $first_line = 0;
@@ -2192,7 +2193,8 @@
}
#next;
}
- if ($rawline=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
+ if ($rawline=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@(.*)/) {
+ my $context = $4;
$realline=$1-1;
if (defined $2) {
$realcnt=$3+1;
@@ -2201,6 +2203,12 @@
}
$in_comment = 0;
+ if ($context =~ /\b(\w+)\s*\(/) {
+ $context_function = $1;
+ } else {
+ undef $context_function;
+ }
+
# Guestimate if this is a continuing comment. Run
# the context looking for a comment "edge". If this
# edge is a close comment then we must be in a comment
@@ -5157,6 +5165,16 @@
"break quoted strings at a space character\n" . $hereprev);
}
+#check for an embedded function name in a string when the function is known
+# as part of a diff. This does not work for -f --file checking as it
+#depends on patch context providing the function name
+ if ($line =~ /^\+.*$String/ &&
+ defined($context_function) &&
+ get_quoted_string($line, $rawline) =~ /\b$context_function\b/) {
+ WARN("EMBEDDED_FUNCTION_NAME",
+ "Prefer using \"%s\", __func__ to embedded function names\n" . $herecurr);
+ }
+
# check for spaces before a quoted newline
if ($rawline =~ /^.*\".*\s\\n/) {
if (WARN("QUOTED_WHITESPACE_BEFORE_NEWLINE",