[PATCH 1/1] checkpatch.pl: thou shalt not use () or (...) in function declarations

[Phil Carmody]

After HPA's wonderful lkml post, referenced, it seems worth trying to
detect this robomatically.

Signed-off-by: Phil Carmody <ext-phil.2.carmody@xxxxxxxxx>
---
 scripts/checkpatch.pl |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index a3b9782..3993011 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1881,6 +1881,10 @@ sub process {
 				substr($ctx, 0, $name_len + 1, '');
 				$ctx =~ s/\)[^\)]*$//;
 
+				if ($ctx =~ /^\s*(?:\.\.\.)?\s*$/) {
+					# HPA explains why: http://lwn.net/Articles/487493/
+					ERROR("(...) and () are not sufficiently informative function declarations\n$hereline");
+				}
 				for my $arg (split(/\s*,\s*/, $ctx)) {
 					if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/s || $arg =~ /^($Ident)$/s) {
 
-- 
1.7.2.5

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