[patch 07/20] KVM/PPC/Book3S HV: Use cpuhp_setup_state_nocalls_locked()

[Thomas Gleixner]

From: Sebastian Andrzej Siewior <bige...@linutronix.de>

kvmppc_alloc_host_rm_ops() holds get_online_cpus() while invoking
cpuhp_setup_state_nocalls().

cpuhp_setup_state_nocalls() invokes get_online_cpus() as well. This is
correct, but prevents the conversion of the hotplug locking to a percpu
rwsem.

Use cpuhp_setup_state_nocalls_locked() to avoid the nested call.

Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de>
Signed-off-by: Thomas Gleixner <t...@linutronix.de>
Cc: Alexander Graf <ag...@suse.com>
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Cc: Michael Ellerman <m...@ellerman.id.au>
Cc: k...@vger.kernel.org
Cc: kvm-...@vger.kernel.org
Cc: linuxppc-...@lists.ozlabs.org

---
 arch/powerpc/kvm/book3s_hv.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -3336,10 +3336,10 @@ void kvmppc_alloc_host_rm_ops(void)
                return;
        }
 
-       cpuhp_setup_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE,
-                                 "ppc/kvm_book3s:prepare",
-                                 kvmppc_set_host_core,
-                                 kvmppc_clear_host_core);
+       cpuhp_setup_state_nocalls_locked(CPUHP_KVM_PPC_BOOK3S_PREPARE,
+                                        "ppc/kvm_book3s:prepare",
+                                        kvmppc_set_host_core,
+                                        kvmppc_clear_host_core);
        put_online_cpus();
 }