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x86: fix NUMA emulation on 64-bit 

I found a small bug of NUMA emulation code for x86_64. (CONFIG_NUMA_EMU)
If machine is non-NUMA, find_node_by_addr() should return
NUMA_NO_NODE, but current implementation code returns existent maximum
NUMA node number + 1.
This is not existent NUMA node number.

However, this behaviour does not affect NUMA emulation fortunately, because
acpi_fake_nodes() that is caller of find_node_by_addr() gets pxm
(proximity domain) by node_to_pxm() from non-existent NUMA node number
that was returned by find_node_by_addr().
node_to_pxm() returns PXM_INVAL that means illegal or non-existent
NUMA node number.

Signed-off-by: Minoru Usui <usui@mxm.nes.nec.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Minoru Usui 2008-01-30 13:33:35 +01:00 committed by Ingo Molnar
parent 53391fa20c
commit 9a1b62fe85
1 changed files with 1 additions and 1 deletions
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2
arch/x86/mm/srat_64.c
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@ -416,7 +416,7 @@ static int __init find_node_by_addr(unsigned long addr)
break;
}
}
return i;
return ret;
}
/*