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

From: Stephen Rothwell <[email-masked]>
Date: Fri, 27 Sep 2013 18:02:19 +1000

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 <[email-masked]>
Date: Fri, 27 Sep 2013 17:58:55 +1000
Subject: [PATCH] x86/mem-hotplug: fix for bad merge

Signed-off-by: Stephen Rothwell <[email-masked]>
---
 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                    [email-masked]