linux-kernel - [PATCH] x86-64: fix combining of regions in init_memory

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Message-Id: <48CA9C18.76E4.0078.0@novell.com>
Date:	Fri, 12 Sep 2008 15:43:04 +0100
From:	"Jan Beulich" <jbeulich@...ell.com>
To:	<mingo@...e.hu>, <tglx@...utronix.de>, <hpa@...or.com>
Cc:	<linux-kernel@...r.kernel.org>
Subject: [PATCH] x86-64: fix combining of regions in
	 init_memory_mapping()

When nr_range gets decremented, the same slot must be considered for
coalescing with its new successor again.

Signed-off-by: Jan Beulich <jbeulich@...ell.com>

---
 arch/x86/mm/init_64.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-2.6.27-rc6/arch/x86/mm/init_64.c	2008-08-29 10:53:00.000000000 +0200
+++ 2.6.27-rc6-x86_64-mr-coalesce/arch/x86/mm/init_64.c	2008-09-12 11:58:45.000000000 +0200
@@ -636,7 +636,7 @@ unsigned long __init_refok init_memory_m
 		old_start = mr[i].start;
 		memmove(&mr[i], &mr[i+1],
 			 (nr_range - 1 - i) * sizeof (struct map_range));
-		mr[i].start = old_start;
+		mr[i--].start = old_start;
 		nr_range--;
 	}
 



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