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Date: Wed, 7 Jun 2017 04:36:20 -0700 From: Joe Perches <joe@...ches.com> To: Andrew Morton <akpm@...ux-foundation.org>, Andy Whitcroft <apw@...onical.com> Cc: Greg KH <gregkh@...uxfoundation.org>, David Kershner <david.kershner@...sys.com>, linux-kernel@...r.kernel.org Subject: [PATCH] checkpatch: Improve tests for multiple line function definitions Add a block that identifies multiple line function definitions. Save the function name into $context_function to improve the embedded function name test. Look for misplaced open brace on the function definition. Emit an OPEN_BRACE error when the function definition is similar to void foo(int arg1, int arg2) { Miscellanea: o Remove the $realfile test in function declaration w/o named arguments test o Comment the function declaration w/o named arguments test Signed-off-by: Joe Perches <joe@...ches.com> --- scripts/checkpatch.pl | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 7fcaf5ca997b..3643d390eb1a 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -5897,7 +5897,8 @@ sub process { "externs should be avoided in .c files\n" . $herecurr); } - if ($realfile =~ /\.[ch]$/ && defined $stat && +# check for function declarations that have arguments without identifier names + if (defined $stat && $stat =~ /^.\s*(?:extern\s+)?$Type\s*$Ident\s*\(\s*([^{]+)\s*\)\s*;/s && $1 ne "void") { my $args = trim($1); @@ -5910,6 +5911,29 @@ sub process { } } +# check for function definitions + if ($^V && $^V ge 5.10.0 && + defined $stat && + $stat =~ /^.\s*(?:$Storage\s+)?$Type\s*($Ident)\s*$balanced_parens\s*{/s) { + $context_function = $1; + +# check for multiline function definition with misplaced open brace + my $ok = 0; + my $cnt = statement_rawlines($stat); + my $herectx = $here . "\n"; + for (my $n = 0; $n < $cnt; $n++) { + my $rl = raw_line($linenr, $n); + $herectx .= $rl . "\n"; + $ok = 1 if ($rl =~ /^[ \+]\{/); + $ok = 1 if ($rl =~ /\{/ && $n == 0); + last if $rl =~ /^[ \+].*\{/; + } + if (!$ok) { + ERROR("OPEN_BRACE", + "open brace '{' following function definitions go on the next line\n" . $herectx); + } + } + # checks for new __setup's if ($rawline =~ /\b__setup\("([^"]*)"/) { my $name = $1; -- 2.10.0.rc2.1.g053435c
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