linux-kernel - Re: undefined reference to `printk'

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Date:	Mon, 27 Jun 2016 14:14:36 +0900
From:	Yoshinori Sato <ysato@...rs.sourceforge.jp>
To:	linux-kernel@...r.kernel.org,
	Josh Triplett <josh@...htriplett.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	kbuild-all@...org,
	Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: undefined reference to `printk'

I think fix it.
default_eit_handler rewritten in C, it is best way.
But it test difficult.

Signed-off-by: Yoshinori Sato <ysato@...rs.sourceforge.jp>
---
 arch/m32r/kernel/entry.S | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/m32r/kernel/entry.S b/arch/m32r/kernel/entry.S
index c639bfa..a71105c 100644
--- a/arch/m32r/kernel/entry.S
+++ b/arch/m32r/kernel/entry.S
@@ -419,6 +419,12 @@ ENTRY(default_eit_handler)
 infinit:
 	bra	infinit
 
+#ifndef CONFIG_PRINTK
+printk:
+	jmp	lr
+	.fillinsn
+#endif
+
 #ifdef CONFIG_ MMU
 /*
  * Access Exception handler
2.7.0

On Sun, 26 Jun 2016 10:19:50 +0900,
kbuild test robot wrote:
> 
> Hi,
> 
> FYI, the error/warning still remains.
> 
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   da2f6aba4a21f8da3331e5251a117c52764da579
> commit: 5d2acfc7b974bbd3858b4dd3f2cdc6362dd8843a kconfig: make allnoconfig disable options behind EMBEDDED and EXPERT
> date:   2 years, 3 months ago
> config: m32r-allnoconfig (attached as .config)
> compiler: m32r-linux-gcc (GCC) 4.9.0
> reproduce:
>         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git checkout 5d2acfc7b974bbd3858b4dd3f2cdc6362dd8843a
>         # save the attached .config to linux build tree
>         make.cross ARCH=m32r 
> 
> All errors (new ones prefixed by >>):
> 
>    arch/m32r/kernel/built-in.o: In function `default_eit_handler':
> >> (.text+0x3f8): undefined reference to `printk'
>    arch/m32r/kernel/built-in.o: In function `default_eit_handler':
>    (.text+0x3f8): relocation truncated to fit: R_M32R_26_PCREL_RELA against undefined symbol `printk'
> 
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

-- 
Yoshinori Sato
<ysato@...rs.sourceforge.jp>