linux-kernel - Re: sh kexec build error

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Date:	Mon, 28 Jul 2008 22:14:44 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	Adrian Bunk <bunk@...nel.org>
Cc:	Huang Ying <ying.huang@...el.com>, Vivek Goyal <vgoyal@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	ebiederm@...ssion.com, linux-sh@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: sh kexec build error

On Mon, Jul 28, 2008 at 04:06:13PM +0300, Adrian Bunk wrote:
> Commit 3ab83521378268044a448113c6aa9a9e245f4d2f (kexec jump)
> causes the following build error on sh:
> 
> <--  snip  -->
> 
> ...
>   CC      kernel/kexec.o
> {standard input}: Assembler messages:
> {standard input}:1518: Error: offset to unaligned destination
> make[2]: *** [kernel/kexec.o] Error 1
> 
> <--  snip  -->
> 
> If I understand the assembler correctly it fails at
> include/asm-sh/kexec.h:59
> 
Indeed. This should fix it:

---

diff --git a/include/asm-sh/processor_32.h b/include/asm-sh/processor_32.h
index c6583f2..0dadd75 100644
--- a/include/asm-sh/processor_32.h
+++ b/include/asm-sh/processor_32.h
@@ -19,7 +19,7 @@
  * Default implementation of macro that returns current
  * instruction pointer ("program counter").
  */
-#define current_text_addr() ({ void *pc; __asm__("mova	1f, %0\n1:":"=z" (pc)); pc; })
+#define current_text_addr() ({ void *pc; __asm__("mova	1f, %0\n.align 2\n1:":"=z" (pc)); pc; })
 
 /* Core Processor Version Register */
 #define CCN_PVR		0xff000030
--
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