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ACPI/NUMA: Do not map pxm to node when NUMA is turned off

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acpi_map_pxm_to_node() unconditially maps nodes even when NUMA is turned
off. So acpi_get_node() might return a node > 0, which is fatal when NUMA
is disabled as the rest of the kernel assumes that only node 0 exists.

Expose numa_off to the acpi code and return NUMA_NO_NODE when it's set.

Signed-off-by: Boris Ostrovsky <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Boris Ostrovsky 2016-12-12 23:18:29 -05:00 • committed by Thomas Gleixner
commit aec03f89e9
5 changed files with 7 additions and 3 deletions
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2
drivers/acpi/numa.c
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@ -70,7 +70,7 @@ int acpi_map_pxm_to_node(int pxm)
{
int node;
if (pxm < 0 || pxm >= MAX_PXM_DOMAINS)
if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off)
return NUMA_NO_NODE;
node = pxm_to_node_map[pxm];