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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.

The issue is apparently pretty benign to native code, but surfaces as a
boot time crash in our forward ported Xen tree (where the page table
setup overall works differently than in native).

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jan Beulich 2008-09-12 15:43:04 +01:00 committed by Ingo Molnar
parent 59ef48a58e
commit 5e72d9e485
1 changed files with 1 additions and 1 deletions
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2
arch/x86/mm/init_64.c
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@ -746,7 +746,7 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
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--;
}