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Subjectlinux-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:

arch/x86/mm/init.c: In function 'memory_map_bottom_up':
arch/x86/mm/init.c:512:18: error: 'STEP_SIZE_SHIFT' undeclared (first use in this function)
step_size <<= STEP_SIZE_SHIFT;
^

Caused by commit 21376f622b03 ("x86/mem-hotplug: support initializing
page tables in bottom-up mode") interacting with commit 6979287a7df6
("x86/mm: Add 'step_size' comments to init_mem_mapping()") from the tip
tree.

I added the following merge fix patch:

From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Fri, 27 Sep 2013 17:58:55 +1000
Subject: [PATCH] x86/mem-hotplug: fix for bad merge

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
arch/x86/mm/init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index cb77179..58bb4e9 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -509,7 +509,7 @@ static void __init memory_map_bottom_up(unsigned long map_start,
start = next;

if (new_mapped_ram_size > mapped_ram_size)
- step_size <<= STEP_SIZE_SHIFT;
+ step_size = get_new_step_size(step_size);
mapped_ram_size += new_mapped_ram_size;
}
}
--
1.8.4.rc3
--
Cheers,
Stephen Rothwell sfr@canb.auug.org.au
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