From b1a39a718db44ecb18c2a99a11e15f6eedc14c53 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Thu, 7 Dec 2023 15:12:01 +0000 Subject: KVM: Convert comment into an assertion in kvm_io_bus_register_dev() Instead of having a comment indicating the need to hold slots_lock when calling kvm_io_bus_register_dev(), make it explicit with a lockdep assertion. Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20231207151201.3028710-6-maz@kernel.org Signed-off-by: Oliver Upton --- virt/kvm/kvm_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'virt') diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 486800a7024b..278d31ae45d8 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -5545,7 +5545,6 @@ int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr, return r < 0 ? r : 0; } -/* Caller must hold slots_lock. */ int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len, struct kvm_io_device *dev) { @@ -5553,6 +5552,8 @@ int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, struct kvm_io_bus *new_bus, *bus; struct kvm_io_range range; + lockdep_assert_held(&kvm->slots_lock); + bus = kvm_get_bus(kvm, bus_idx); if (!bus) return -ENOMEM; -- cgit v1.2.3-70-g09d2