When building a random powerpc kernel I hit this build error:
  CC      arch/powerpc/platforms/powernv/opal-imc.o
arch/powerpc/platforms/powernv/opal-imc.c: In function « 
disable_nest_pmu_counters »:
arch/powerpc/platforms/powernv/opal-imc.c:130:13: error : assignment discards « 
const » qualifier from pointer target type [-Werror=discarded-qualifiers]
   l_cpumask = cpumask_of_node(nid);
             ^
This patch simply add const to l_cpumask to fix this issue.

Signed-off-by: Corentin Labbe <clabbe.montj...@gmail.com>
---
 arch/powerpc/platforms/powernv/opal-imc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/powernv/opal-imc.c 
b/arch/powerpc/platforms/powernv/opal-imc.c
index b903bf5e6006..21f6531fae20 100644
--- a/arch/powerpc/platforms/powernv/opal-imc.c
+++ b/arch/powerpc/platforms/powernv/opal-imc.c
@@ -123,7 +123,7 @@ static int imc_pmu_create(struct device_node *parent, int 
pmu_index, int domain)
 static void disable_nest_pmu_counters(void)
 {
        int nid, cpu;
-       struct cpumask *l_cpumask;
+       const struct cpumask *l_cpumask;
 
        get_online_cpus();
        for_each_online_node(nid) {
-- 
2.13.0

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