From e45bab8ebfee65ba89b228c1e7c64a6cb0812124 Mon Sep 17 00:00:00 2001
From: Andy Whitcroft <apw@canonical.com>
Date: Fri, 23 Mar 2012 15:02:18 -0700
Subject: [PATCH] checkpatch: handle string concatenation in simple #defines

Adjacent strings indicate concatentation, therefore look at identifiers
directly adjacent to literal strings as strings too.  This allows us to
better detect the form below and accept it as a simple constant:

    #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

Signed-off-by: Andy Whitcroft <apw@canonical.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/checkpatch.pl | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 95ba30a24dcf..01a65988a057 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2894,6 +2894,12 @@ sub process {
 			{
 			}
 
+			# Flatten any obvious string concatentation.
+			while ($dstat =~ s/("X*")\s*$Ident/$1/ ||
+			       $dstat =~ s/$Ident\s*("X*")/$1/)
+			{
+			}
+
 			my $exceptions = qr{
 				$Declare|
 				module_param_named|
-- 
2.20.1