linux-kernel - [PATCH AUTOSEL for 4.4 11/36] scripts/kernel-doc: Don't fail with status != 0 if error encountered with -none

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Message-ID: <20180128222815.29479-11-alexander.levin@microsoft.com>
Date:   Sun, 28 Jan 2018 22:28:30 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     Will Deacon <will.deacon@....com>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        Jonathan Corbet <corbet@....net>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.4 11/36] scripts/kernel-doc: Don't fail with
 status != 0 if error encountered with -none

From: Will Deacon <will.deacon@....com>

[ Upstream commit e814bccbafece52a24e152d2395b5d49eef55841 ]

My bisect scripts starting running into build failures when trying to
compile 4.15-rc1 with the builds failing with things like:

drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:2078: error: Cannot parse struct or union!

The line in question is actually just a #define, but after some digging
it turns out that my scripts pass W=1 and since commit 3a025e1d1c2ea
("Add optional check for bad kernel-doc comments") that results in
kernel-doc running on each source file. The file in question has a
badly formatted comment immediately before the #define:

/**
 * struct brcmf_skbuff_cb reserves first two bytes in sk_buff::cb for
 * bus layer usage.
 */

which causes the regex in dump_struct to fail (lack of braces following
struct declaration) and kernel-doc returns 1, which causes the build
to fail.

Fix the issue by always returning 0 from kernel-doc when invoked with
-none. It successfully generates no documentation, and prints out any
issues.

Cc: Matthew Wilcox <mawilcox@...rosoft.com>
Cc: Jonathan Corbet <corbet@....net>
Signed-off-by: Will Deacon <will.deacon@....com>
Signed-off-by: Jonathan Corbet <corbet@....net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 scripts/kernel-doc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 638a38e1b419..bba8ad9c4f2c 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -2742,4 +2742,4 @@ if ($verbose && $warnings) {
   print STDERR "$warnings warnings\n";
 }

-exit($errors);
+exit($output_mode eq "none" ? 0 : $errors);
-- 
2.11.0