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powerpc/numa: Check for all VPHN changes

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The hypervisor uses unsigned 1 byte counters to signal topology changes to
the OS. Since they can wrap we need to check for any difference, not just if
the hypervisor count is greater than the previous count.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard 2011-01-29 12:26:19 +00:00 committed by Benjamin Herrenschmidt
parent 5de1669910
commit d69043e806
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/mm/numa.c
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@ -1341,7 +1341,7 @@ static int update_cpu_associativity_changes_mask(void)
volatile u8 *hypervisor_counts = lppaca[cpu].vphn_assoc_counts;
for (i = 0; i < distance_ref_points_depth; i++) {
if (hypervisor_counts[i] > counts[i]) {
if (hypervisor_counts[i] != counts[i]) {
counts[i] = hypervisor_counts[i];
changed = 1;
}