arm64: smp: remove cpu and numa topology information when hotplugging out CPU

We already repopulate the information on CPU hotplug-in, so we can safely
remove the CPU topology and NUMA cpumap information during CPU hotplug
out operation. This will help to provide the correct cpumask for
scheduler domains.

Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Tested-by: Ganapatrao Kulkarni <[email protected]>
Tested-by: Hanjun Guo <[email protected]>
Signed-off-by: Sudeep Holla <[email protected]>
Signed-off-by: Will Deacon <[email protected]>

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 2a315f32fad34a1935cd93a8c0873996b7cb2a66..a44cc09059b5708992d586479ebb65c6695291b4 100644 (file)
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -279,6 +279,9 @@ int __cpu_disable(void)
        if (ret)
                return ret;
 
+       remove_cpu_topology(cpu);
+       numa_remove_cpu(cpu);
+
        /*
         * Take this CPU offline.  Once we clear this, we can't return,
         * and we must not schedule until we're ready to give up the cpu.