linux-kernel - linux-next: build failure after merge of the akpm-current tree

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Message-ID: <20150204185328.1ee3ce3c@canb.auug.org.au>
Date:	Wed, 4 Feb 2015 18:53:28 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andrey Ryabinin <a.ryabinin@...sung.com>
Subject: linux-next: build failure after merge of the akpm-current tree

Hi Andrew,

After merging the akpm-current tree, today's linux-next build (x86-64
allmodconfig) failed like this:

scripts/Makefile.kasan:21: CONFIG_KASAN: compiler does not support all options. Trying minimal configuration
scripts/Makefile.kasan:21: CONFIG_KASAN: compiler does not support all options. Trying minimal configuration
x86_64-linux-gcc: warning: unrecognized argument to -fsanitize= option: 'kernel-address'

lots and lots of this last message ...

Caused by the commits that added the kernel address sanitizer.

gcc version 4.9.0 cross compiling from Powerpc64.

I have added the following patch for today (after which I only got one
of the "compiler does not support all options" messages).

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Wed, 4 Feb 2015 18:43:52 +1100
Subject: [PATCH] disable CONFIG_KASAN for now

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 lib/Kconfig.kasan | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
index 4fecaedc80a2..4301bb56e3ce 100644
--- a/lib/Kconfig.kasan
+++ b/lib/Kconfig.kasan
@@ -1,7 +1,7 @@
 config HAVE_ARCH_KASAN
 	bool

-if HAVE_ARCH_KASAN
+if HAVE_ARCH_KASAN && BROKEN

 config KASAN
 	bool "KASan: runtime memory debugger"
-- 
2.1.4

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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