[tip: core/rcu] x86/kvm/pmu: Replace rcu_swap_protected() with rcu_replace_pointer()

[tip: core/rcu] x86/kvm/pmu: Replace rcu_swap_protected() with rcu_replace_pointer()

[tip-bot2 for Paul E. McKenney]

The following commit has been merged into the core/rcu branch of tip:

Commit-ID:     12e78e6902134c9e49b2481c2515555e6f7b12dc
Gitweb:        https://git.kernel.org/tip/12e78e6902134c9e49b2481c2515555e6f7b12dc
Author:        Paul E. McKenney <paulmck@kernel.org>
AuthorDate:    Mon, 23 Sep 2019 15:15:35 -07:00
Committer:     Paul E. McKenney <paulmck@kernel.org>
CommitterDate: Wed, 30 Oct 2019 08:43:51 -07:00

x86/kvm/pmu: Replace rcu_swap_protected() with rcu_replace_pointer()

This commit replaces the use of rcu_swap_protected() with the more
intuitively appealing rcu_replace_pointer() as a step towards removing
rcu_swap_protected().

Link: https://lore.kernel.org/lkml/CAHk-=wiAsJLw1egFEE=Z7-GGtM6wcvtyytXZA1+BHqta4gg6Hw@mail.gmail.com/
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
[ paulmck: From rcu_replace() to rcu_replace_pointer() per Ingo Molnar. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <x86@kernel.org>
Cc: <kvm@vger.kernel.org>
---
 arch/x86/kvm/pmu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index 46875bb..5ddb05a 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -416,8 +416,8 @@ int kvm_vm_ioctl_set_pmu_event_filter(struct kvm *kvm, void __user *argp)
 	*filter = tmp;
 
 	mutex_lock(&kvm->lock);
-	rcu_swap_protected(kvm->arch.pmu_event_filter, filter,
-			   mutex_is_locked(&kvm->lock));
+	filter = rcu_replace_pointer(kvm->arch.pmu_event_filter, filter,
+				     mutex_is_locked(&kvm->lock));
 	mutex_unlock(&kvm->lock);
 
 	synchronize_srcu_expedited(&kvm->srcu);