powerpc/numa: Suppress "VPHN is not supported" messages

[ Upstream commit 437ccdc8ce629470babdda1a7086e2f477048cbd ]

When VPHN function is not supported and during cpu hotplug event,
kernel prints message 'VPHN function not supported. Disabling
polling...'. Currently it prints on every hotplug event, it floods
dmesg when a KVM guest tries to hotplug huge number of vcpus, let's
just print once and suppress further kernel prints.

Signed-off-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 055b211b7126694e1a97643542a8013853ce1c17..5500e4edabc63e006af83b8978b0a28359772e70 100644 (file)
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -1179,7 +1179,7 @@ static long vphn_get_associativity(unsigned long cpu,
 
        switch (rc) {
        case H_FUNCTION:
-               printk(KERN_INFO
+               printk_once(KERN_INFO
                        "VPHN is not supported. Disabling polling...\n");
                stop_topology_update();
                break;