From d8d7b731f1f799f225f0c968ccb0508397657d87 Mon Sep 17 00:00:00 2001
From: Daniel Santos <daniel.santos@pobox.com>
Date: Thu, 4 Oct 2012 17:15:05 -0700
Subject: [PATCH] kernel-doc: bugfix - multi-line macros

commit 654784284430bf2739985914b65e09c7c35a7273 upstream.

Prior to this patch the following code breaks:

/**
 * multiline_example - this breaks kernel-doc
 */
 #define multiline_example( \
myparam)

Producing this error:

Error(somefile.h:983): cannot understand prototype: 'multiline_example( \ '

This patch fixes the issue by appending all lines ending in a blackslash
(optionally followed by whitespace), removing the backslash and any
whitespace after it prior to appending (just like the C pre-processor
would).

This fixes a break in kerel-doc introduced by the additions to rbtree.h.

Signed-off-by: Daniel Santos <daniel.santos@pobox.com>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 scripts/kernel-doc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index d793001929cf..ba3d9dfada52 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -2044,6 +2044,9 @@ sub process_file($) {
 
     $section_counter = 0;
     while (<IN>) {
+	while (s/\\\s*$//) {
+	    $_ .= <IN>;
+	}
 	if ($state == 0) {
 	    if (/$doc_start/o) {
 		$state = 1;		# next line is always the function name
-- 
2.39.2