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Date: Tue, 12 Feb 2013 16:19:12 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Tony Luck <tony.luck@gmail.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>, Matt Fleming <matt.fleming@intel.com>,
        fenghua.yu@intel.com, Liujiang <jiang.liu@huawei.com>,
        linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-efi@vger.kernel.org, linux-mm@kvack.org,
        Hanjun Guo <guohanjun@huawei.com>, WuJianguo <wujianguo@huawei.com>
Subject: Re: [PATCH V3] ia64/mm: fix a bad_page bug when crash kernel
 booting
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On Tue, 12 Feb 2013 16:11:33 -0800
Tony Luck <tony.luck@gmail.com> wrote:

> Building linux-next today (tag next-20130212) I get the following errors when
> building arch/ia64/configs/{tiger_defconfig, zx1_defconfig, bigsur_defconfig,
> sim_defconfig}
> 
> arch/ia64/mm/init.c: In function 'free_initrd_mem':
> arch/ia64/mm/init.c:215: error: 'max_addr' undeclared (first use in
> this function)
> arch/ia64/mm/init.c:215: error: (Each undeclared identifier is
> reported only once
> arch/ia64/mm/init.c:215: error: for each function it appears in.)
> arch/ia64/mm/init.c:216: error: implicit declaration of function
> 'GRANULEROUNDDOWN'
> 
> with "git blame" saying that these lines in init.c were added/changed by
> 
> commit 5a54b4fb8f554b15c6113e30ca8412b7fe11c62e
> Author: Xishi Qiu <qiuxishi@huawei.com>
> Date:   Thu Feb 7 12:25:59 2013 +1100
> 
>     ia64/mm: fix a bad_page bug when crash kernel booting
> 

Presumably this:

--- a/arch/ia64/mm/init.c~ia64-mm-fix-a-bad_page-bug-when-crash-kernel-booting-fix
+++ a/arch/ia64/mm/init.c
@@ -27,6 +27,7 @@
 #include <asm/machvec.h>
 #include <asm/numa.h>
 #include <asm/patch.h>
+#include <asm/meminit.h>
 #include <asm/pgalloc.h>
 #include <asm/sal.h>
 #include <asm/sections.h>
_


But, umm, why am I sitting here trying to maintain an ia64 bugfix and
handling bug reports from the ia64 maintainer?  Wanna swap?